Website security indicators For Google Chrome

When you connect to a website, Google Chrome can show you details about your connection and alert you if it’s unable to establish a fully secure connection with the site. Learn about Google Chrome's security settings.

See if the site is using a secure connection (SSL)

If you’re entering sensitive personal information on a page, look for a lock icon to the left of the site’s URL in the address bar to see if the site uses SSL. SSL is a protocol that provides an encrypted tunnel between your computer and the site you’re viewing. Sites can use SSL to prevent third parties from interfering with the information traveling through the tunnel.

The site isn't using SSL. Most sites don’t need to use SSL because they don’t handle sensitive information. Avoid entering sensitive information, such as usernames and passwords, on the page.

Google Chrome has successfully established a secure connection with the site.Look for this icon and check the URL if you’re required to log in to the site or enter sensitive information on the page. 

If a site uses an Extended Validation SSL (EV-SSL) certificate, the organization's name also appears next to the icon in green text. Make sure the browser is set to check for server certification revocation to identify sites with EV-SSL certificates. bellow

EV-SSL certificates

Set Google Chrome to check for server certification revocation. These steps apply to Google Chrome on Windows, Mac, Linx, and Chrome OS:

1. Click the wrench  icon  on the browser toolbar.
2. Select Options (Preferences on Mac and Linux; Settings on Chrome OS).
3. Click the Under the Hood tab.
4. Select the “Check for server certificate revocation” checkbox.

If you still don't see the organization's name, it may be due to one of the following conditions:

• The website might not use an EV-SSL certificate. EV certificates provide extra assurance as to the identity of the website, but not all websites using SSL use EV-SSL certificates.
• The website might contain security errors, such as mixed content or expired certificates.
• The certificate revocation information may be temporarily unavailable from the server.

 The site uses SSL, but Google Chrome has detected insecure content on the page.Be careful if you’re entering sensitive information on this page. Insecure content can provide a loophole for someone to manipulate the page.

 The site uses SSL, but Google Chrome has detected either high-risk insecure content on the page or problems with the site’s certificate. Don’t enter sensitive information on this page. Invalid certificate or other serious https issues could indicate that someone is attempting to tamper with your connection to the site.

See more details about the site

Click the   icon or the lock icon to see even more details about the site’s identity, your connection, and your visit history for the site.

Site identity

Sites using SSL present security certificates to the browser to verify their identity. Anyone can set up a website pretending to be another site, but only the real site possesses a valid security certificate for the URL you’re trying to reach. Invalid certificates could indicate that someone is attempting to tamper with your connection to the site.

The site’s certificate is valid and its identity has been verified by a trusted third-party authority.

The site has not provided the browser with a certificate. This is normal for regular HTTP sites (look for the   icon in the address bar), because certificates are usually provided only if the site uses SSL.

Google Chrome has detected problems with the site’s certificate. You should proceed with caution because the site may be pretending to be another site in order to trick you into sharing personal or other sensitive information with them.

Your connection to the site

Google Chrome lets you know whether your connection is fully encrypted. If your connection is insecure, third parties might be able to view or tamper with the information you provide on the site.

Your connection to the site is not encrypted. This is normal for regular HTTP sites (look for the  icon in the address bar).

Your connection to the site is encrypted, but Google Chrome has detected mixed content on the page. Be careful if you’re entering information on this page. Mixed content can provide a loophole for someone to manipulate the page. This content could be third-party images, videos, or ads embedded on the page. 

If you’re connected to the Internet via a public wireless network, mixed content is especially risky because wireless networks are easier to tamper with than wired networks.

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Slow Computer? Speed Up Your PC By Disabling Unnecessary Windows Services

Having a slow computer is what most Windows users lament. Sometimes it's just a matter of outdated hardware and a few bucks for a new motherboard or an extra GB of RAM will do. But most of the time it's your Windows becoming a hog and slowing your productivity down. What can you do to speed up a computer in such situations? Before you start formatting your PC for the nth time, read how to fix a slow computer by disabling unnecessary Windows services that you keep running on your machine.          

Windows PCs have a long tradition of not managing well long and uninterrupted use across different applications, and also having a slew of background services running at all times inside your PC RAM which are actually completely unneeded.

Your computer is indeed filled with hidden functions and services whose existence you may barely know.

Most of the times, such a large number of unnecessary background services running is one of the main causes that slow down your computer to a crawl without any valid reason.

You probably have heard people telling you that you can speed up your computer by stopping these unnecessary Windows services.

Slow Computer: How To Increase Computer Speed

Important Notes Before You Start

1. To enter service manager and enable / disable Windows services, go to:

   Start > Run > Type "services.msc" (without quotes) and hit Enter

click on start then click Run

write services.msc and hit Enter or ok

1. To toggle the startup type of a service between Automatic, Manual and Disabled, double-click on the required service and then choose the specific option from the listbox titled "Startup Type" in the "General" tab.click on the required service and then choose the specific option from the listbox titled "Startup Type" in the "General" tab
2. 
3. If you are unsure about a service or for some reason you think it might be useful, leave it alone or turn it to manual instead of disabling it. This will help protect your computer from accidental damage.
4. Before playing around with Windows services, it's very recommended that you exit all other programs you have opened.
5. There are risks involved in turning down important services, so you are strongly recommended to carefully read the description before attempting to change the startup type of any Windows service.

Watch demo here http://www.facebook.com/video/video.php?v=1361372894360&oid=126914954035515&comments

Speed Up Computer By Disabling Unnecessary Windows Services

Here is a list of unneeded Windows services that you can turn off to speed up your slow computer:

• AdobeLM Service: Not all computers have this service, still it is useless. Just disable it if you have it running on your machine. (Some readers have pointed out inside the comment section that by disabling this service you may incur startup and registration issues with Adobe software.)
• Alerter: Disable this one if you are not on a network because you will not receive alerts.
• Application Layer Gateway Service: Unless you want to share your Internet connection, turn this off as this service provides support for 3rd party protocol plug-ins for Internet Connection Sharing
• Application Management: Set this to manual.
• Automatic Updates: Disable it if you do not require auto-updating and patching of Windows. It is pretty useless if you use auto-patcher by NeoWin to update your Windows OS. Thus, you will save bandwidth.
• Background Intelligent Transfer Service: Disable this if you do not need Automatic Update as well. This is also a potential security threat as it uses idle network bandwidth to transfer data.
• ClipBook: Disable this if you are not on a network, since you do not need to share anything.
• Computer Browser: Disable this too if you are not on a network, as you do not need to browse and monitor connected computers.
• Cryptographic Services: Set this to manual if you are not sure you need it.
• Diagnostic Policy Service: Disable this safely you don't need to be alerted of incorrect software installations on your machine.
• Distributed Link Tracking Client: Disable this service if you have only one computer on a network, or if you do not access other computers.
• Distributed Transaction Service: Set this to manual.
• Error Reporting Service: Disable this service for reporting errors to Microsoft, because they will hardly even reply to you for any error you get. This also saves a lot of bandwidth.
• Fast User Switching Compatibility: Disable it if you have only a single user on your computer, or if you do not use fast user switching feature much. That is, if you completely log off and then allow other users to use your computer, then you do not need this. Note that this service is completely useless for low memory computers.
• FTP Publishing: Disable this if you do not use FTP.
• Help and Support: Set it to manual or turn it off if you do not use the help feature often. You can turn it on again at any time if you need help.
• HTTP SSL: Set it to manual.
• Human Interface Device Access: Turn it off if you do not use hot-keys or remote systems on your computer. Anyway if you use them sometimes, it is better turn it to manual.
• IIS: The Internet Information Services provide the capabilities of a web server for your computer. If you don't need this option (you likely don't), turn it off safely.
• IKE and AuthIP IPsec Keying Modules: If you don't need to use IKE or IPsec (most home users don't), disable this.
• IMAPI CD-Burning COM Service: Set this to manual to save memory and time. Do not turn it off if you have a CD writer or a DVD writer attached to your computer.
• Indexing Service: Turn it off, as this uses a lot of CPU. If you are an avid searcher, like a maniac, on your computer, leave it on since it will help you. If you know where your files are and do not use search that often, then disable it for your good.
• InstallDriver Table Manager: Disable it safely.
• Integrated Peripherals: Disable peripherals you do not need like network cards, integrated graphic or sound, etc. Go to "Run" and type "devgmt.msc" (without quotes)
• IP Helper: If you don't need support for IPv6, safely disable this.
• IPSEC Services: Set this to manual.
• Messenger: This service is not related with Windows Live Messenger. If you don't want unauthorized access to your PC, disable it.
• Messenger Sharing Folders USN Journal Reader Service: If you do not use Live Messenger 8.0 (or higher) and / or you don't need sharing folders, you can safely disable this.
• MS Software Shadow Copy Provider: Set this to manual.
• Net Logon: Disable this if you are not on a network.
• NetMeeting Remote Desktop Sharing: Disable this if you do not use the Remote Desktop feature.
• Network Location Awareness: Safely disable this if you are not under a LAN or if you do not need to share files or hardware connected to your computer (like a printer).
• Network List Service: You can safely disable this service if you are not on a network.
• Network Provisioning Service: Disable this, as it is useless if you are not on a network.
• Network Throttling: Select FFFFFFF to forbid Windows to send packages when accessing web streaming content.
• NT LM Security Support Provider: Disable this, it is useless too.
• NVIDIA Display Driver Service: If you do not use the features of NVIDIA Desktop, this service must be disabled; it is a big hog of memory.
• Office Source Engine: Disable it if you have a MS Office CD handy always, its helpful if your installation goes corrupt.
• Offline Files: Disable this if you don't use offline files.
• Portable Media Serial Number Service: Set it to manual if you connect portable media to your computer, otherwise disable it.
• Program Compatibility Assistant: If you don't need to run software designed for previous versions of Windows, you can safely disable this service.
• Print Spooler: Disable it if you do not have a printer connected to your computer.
• Protected Storage: Disable it if you do not allow strangers to sit on your encrypted storage computer.
• QoS RSVP: Unless you're using QoS-aware programs and control applets, you can safely disable this service.
• Readyboost: If you're not using this feature on Windows Vista (uses free space on USB drives to speed up your computer), disable this service.
• Remote Access Connection: Disable this if you are not using any dial-up or VPN.
• Remote Desktop Help Session Manager: Disable it if you do not use the Remote Desktop feature for help and support from Microsoft.
• Remote Procedure Call (RPC) Locator: Set it to manual.
• Remote Registry: Serious security threat if turned on, disable it no matter what.
• Removable Storage: Disable it if you do not use removable storage drives, else turn it to manual.
• Routing and Remote Access: Set it to manual.
• Secondary Logon: Useless feature for most, disable it or turn it manual.
• Security Accounts Manager: Disable it as it is pretty useless unless you use NTFS Encryption.
• Security Center: Damn useless and irritating feature. Disable it.
• Server: Set it to manual or disable it if you are not on network.
• Shell Hardware Detection: Disable this to avoid being asked by AutoPlay if you want to perform an action after a specific input (inserting a CD, connecting an USB peripheral, etc.)
• Smart Card: Disable it if you do not use smart cards on your computer.
• SSDP Discovery Service: Disable it of not on network or don’t have uPnP devices on home networks.
• System Event Notification: If you don't need to track system events such as Windows logon, network, and power events (most users don't), disable it.
• System Restore Service: To improve system performance and take the minor risk of not being able to make your computer work like it did yesterday, disable it.
• Tablet PC Input Service: If you don't have a tablet PC pen, disable it.
• Telnet: Set it to manual if you use this feature, otherwise disable it, especially if you are a home user.
• Terminal Services: Since you are not using Remote Desktop, etc... disable it for good.
• Themes: Themes might be cool, but if you are not into pimping your desktop, you can safely disable this.
• TCP/IP NetBIOS Helper: Set it to manual if on network, otherwise disable it.
• Uninterrupted Power Supply: Disable it if you don’t have a UPS attached to the serial port of your computer.
• Universal Plug and Play Device Host: Set it to manual.
• Upload Manager: If you are not in a local network sharing data (files and / or services), disable it.
• User Privilege Service: Set it to manual.
• Volume Shadow Copy: Disable it if you do not backup your computer using System Restore or Windows Backup.
• Windows Error Reporting Service: Disable this and you will never again be prompted to send an error report to Microsoft when a program crashes.
• Windows Image Acquisition (WIA): If you do not connect / use a camera or scanner with your computer, disable this service, else set it to manual.
• Windows Media Connect: Disable this if you do not use things such as an iPod, etc... for your Windows Media Player.
• Windows Media Connect (WMC) Helper: Disable this if you disabled the one above or if you do not need help from Microsoft.
• Windows Messenger: Disable this if you are not on a network, it uses too much memory and it is a hog. Also, this is likely to become a security threat.
• Windows Time: Disable if not on a synchronized network.
• Wireless Zero Configuration: Disable if not on a wireless network.
• WMI Performance Adapters: Disable it, useless service for basic usage.
• Workstation: Disable if you are not on a network. Or simply, if you are a gamer, just shut this one.

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Classification of computers

the four major categories of computers are personal computers mini computers mainframe computers and super computers these categories based on the different in the size,speed,processing,capabilities,and price of computers

1.PERSONAL COMPUTER

A personal computer is a computer that can perform all of its input processing,output,and storage activities by itself . it is also called stand-alone -computer it caontains at least one input device ,one output device,one storage device memory and processor

Examples

IBM PC/XT/AT

IBM PS/2

TYPES OF PERSONAL COMPUTERS

A.DESKTOP COMPUTERS

B.PORTABLE COMPUTERS

FIRST DEFINE DESKTOP COMPUTER

THE most common type of personal computer is the desktop computer.A desktop computer is designed so the system unit, input devices, output devices, and any other devices fit entirely on or under a desk or table

i.WORKSTATION COMPUTERS

A workstation is a specialized, single user computer that typically has more power and features then a standard desktop PC. these machine are popular among scientists,engineers and animators who need a system with greater than average speed and the power to perform sophisticated tasks.

B.DEFINE PORTABLE COMPUTER

Portable is a personal computer type that can shift easily from one place other place some times this type of computer is also called mobile computer portable computer has following types

I. NOTE BOOK COMPUTERS/ LAPTOP COMPUTERS

Notebook computers as their name implies approximate the 15 inches notebook and easily fit inside a briefcase these computers speed is fast and distance b/w motherboard and hard disk is min

ii. TABLET COMPUTER

THE tablet computer is the newest development in portable full-featured computer tablet computer offers all the functionality of a notebook computer, but they are lighter and can accept input from a special pen called a stylus or a digitalpen

iii. Handheld computer

handheld computer are computing devices small enough to fit in your hand. A popular type of handheld computer is the personal digital assistance (pda)

iv. SMART PHONES COMPUTERS

Some cellular phones double as miniature PCS. Because these phones offer advanced featured not typically found in cellular phones

2. Minicomputers

A minicomputer is more powerful and larger then a workstation computer. Minicomputer often can support up to 4000 connected users at the same time . it is also knows as a mire range computer. Users often access a minicomputer through terminal

terminal is a device with a monitor and keyboard

such terminals sometimes called dumb terminals b/c they have no processing power cannot act as stand alone computers and must be connected to the minicomputer to operate

EXAMPLES

IBM SYSTEM/ 36

IBM SYSTEM/ 38

IBM AS400

3.Mainframe computers

A mainframe is a large expensive very powerful computer that can handle hundreds or thousands of connected users simultaneously . like minicomputer, mainframe computers also can act as a server ina network environment. it is also known as Host computer

Examples

IBM 4300

IBM4340

NEC ACOS mainframe

4.Super computer

A super computer is the fastest most powerful computer and the most expensive . capable of processing more than 64 billion instructions in a single second

super computer are used for applications requiring complex sophisticated mathematical calculation

For example a super computer would be used for weather forecasting nuclear energy etc..

super computer

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