In office I have a PC with Win 2003 server( at present isolated). P4 3GHz+512MB the system is infected with an unknown virus, which converts all .doc and .xls files to the size of 1 KB. plz suggest an antivirus software which will run on this OS. Also at my home I have winxp professional+SP2 on Athlon Xp 1800+1GB machine. Suddenly, a couple of days ago, the firewall got disabled. whenever I click on the Windows Firewall icon in ctrl panel, it says "Due to an unidentified prblem Windows firewall can not be started". It is not even accessible from security center. There has't been ne data Xfer between two PCs. plz suggest..