How to Protect Your Computer from Hackers

When you are connected to the Internet, an IP (internet Protocol) address is used to identify your computer.
If you don’t protect yourself this IP address can be used to access your computer from outside world.
A fixed IP address is a larger security risk. It means of you have a fixed IP address, than you will be give a chance to Internet hackers to enter in your computer all the time and they can get the information from your computer and share it on internet to other user that can be easily access.
Personal computers are often connected to a shared network. PC in large companies is connected to a large corporate works. A pc in small companies is connected to a small local network, and in private home often shares a network between family members. Most of networks are used to share resources like printers, files and disk storage.
When you are connected to the Internet your shared resources can be access by rest of the world.
A common Security Problem:
Windows users are unaware of a common leak in their network settings:

• Client for Microsoft Network
• File and Printer sharing for Microsoft Network
• NetBEUI Protocol

Internet protocol TCP/IP.
If your set up allows Net BIOS over TCP/IP you have a security problem:

• Your files can be shared all over the Internet.
• Your logon-name, computer-name, and workgroup-name are visible to other.
• Your file can be shared all over Internet.

Computers that are connected to any network can also have unsecured network settings, because the setting where changed when Internet was installed.
To solve this problem we can disable NetBIOS over TCP/IP.
For Windows Xp disable the   NetBIOS over TCP/IP as following:

1. Right-click on network connection in the system tray area of the taskbar and choose “Open Network connections”.
2. Right click on the Network connection’s icon and choose “properties” from the group menu that appear.
3. Click on “Internet Protocol (TCP/IP) and than click on “Properties” button. If TCP/IP is not checked for the selected connection type than ignore the below step for this particular network connection.
4. The “Internet Protocol (TCP/IP) Properties” dialog box appears. Click on the “Advanced Button”
5. When “Advanced TCP/IP settings” dialog box appear. Click on “wins” tab.
6. At lower position “NetBIOS setting”, click on the “Disable NetBIOS” over TCP/IP” radio button.
7. Click “ok” on the dialog boxes to close them, and than click “close” on the network connection properties box to close it.
8. Finally, when done modifying each network connection, close the “Network connection” Window.

[If your are not able to access a network after performing this perform above steps but click the “Enable NetBIOS over TCP/IP” or “Default” radio button.]