Are there any free antivirus software compatible with Windows Vista?

I tried to install free Avast 4.7 into my new computer with Windows Vista. It made the computer crashed.

Are there any free antivirus software compatible with Windows Vista?computer protection

AVG Free now compatible with Vista Beta 2

Download Grisoft AVG 7.5 Anti-Virus,Anti-Malware.(free)

AVG is a collection of anti-virus protection tools that gives you full protection against viruses, worms, Trojans and malware. AVG provides you with all that you need to be completely protected: including a tool for scanning your hard drive and e-mail, as well as a real-time shield to prevent infections.

Top Features

禄 Provides automatic update functionality

禄 Its a reliable anti-virus scanning engine

禄 Provides free Virus Updates for life

禄 Options to define file name extensions

禄 Real time protection with resident shield, email scanning

http://free.grisoft.com/doc/5390/lng/us/...

Are there any free antivirus software compatible with Windows Vista?free antivirus download

Norton Anti virus... they made it compatable.
Get the Vista compatible version of Avast!