Antivirus that can run without updates and internet connection

You can run some antivirus without internet or without updating it frequently. Microsoft security essentials is one of them. Though it requires updates for real time protection, you can still update it manually by installing "patch" files.

You can download the patch files from, from here http://support.microsoft.com/kb/971606

 

Before downloading check whether your Microsoft Security Essentials, is which bit, either 32 or 64 bit.

After you install Microsoft Security Essentials on your system, it will ask for a update. Since you dont have a stable network connection, its wont update. Then run the downloaded "patch file", it will ask for system to restart.

After restarting you will find Microsoft Security Essenstials, displays a status message as its " potentially protected ". Thats it, now your system is secured. It can scan any file and protect your system in real time.

And when it asks for a update for second time, again run the patch file. Its solves the problem. Or you can even get those patch files from your friends house, copy that file in pen-drive and install it in yours.

This is best method to run antivirus, for those you don't have stable network connection. Instead of just leaving your system unprotected, use this method.