Windows Operating System provides in-built security known as Windows Firewall which is used for monitoring and restricting data or file which is shared between computers and networks. Windows Firewall protects your computer from external intrusion and works as a shield protecting your PC from unauthorized applications and users. Some intruders might want to steal information or data from your computer, and sometimes even make unauthorized changes in your system. Firewall will prevent these from happening in your computer by checking unauthorized access in your network. It guarantees security by allowing you to decline connection requests ensuring computer safety in all stages.

Windows Firewall is more prominent in Windows XP and the above versions. You can directly access the firewall through the control panel and it is always active by default. It is like any normal application running in your computer, you can set certain program or application to be blocked all the time, or you can let the firewall ask for your permission before running any program or application. The most useful feature of Firewall is that it can block unwanted files which can be viruses, Trojans, spy wares etc. from passing in your computer. All the attempts of unauthorized access to your computer will be generated as a security log which you can use for troubleshooting and strengthen your security further.

Firewalls cannot block spam emails neither can it stop the system from opening emails containing virus. Therefore if you are concerned about viruses then you need a good antivirus working together with the Firewall. Firewall will prevent external intrusion from unwanted users in the network and anti-virus will block viruses coming though websites and email. However if you have any problem with the Windows Firewall then you can check out the online PC support, it wail diagnose and detect the problem enabling you to troubleshoot.

Let me give a brief detail on how to enable Firewall in your PC. It is very simple, first open the ‘Control Panel’ and click on the ‘turn on Windows Firewall’. You can also select ‘Notify me when Firewall blocks a program’. That is all that needs to be done. However sometimes Firewall also blocks some application that you wish to open, in that case you need to select ‘allow this program to run every time’. But before doing this make sure this application that you wish to run is completely safe because the Firewall will never block this application again.