Assuming you have recovered your data, First why not see
if live Cd still works? Also try running memtest, if that is all OK
Try a re-install, also check all connections on hardware.
"Antivirus? You don't need that, virus threats are nearly inexistant in Linux. I never had to use any antivirus and I've run Linux since 1996
- Syware? 90% of your software is open source .. so no spyware in there, and .."search.php?st=0&sk=t&sd=d&keywords=virus&start=15
I also have been running Linux (no windows) since 1997,and never needed firewall or anti virus.
Virus is FUD, it is the exploit of and insecure piece of sofware, i.e. M$ Just uses the name to make it look like it is not the fault of M$