I have problem... possibly new virus

My PC crashes and restarts when he wants. If i run some programs… same thing. I succeed to run quick scan and I got some “autorun” virus but after that cleaning i got virus again. what to do?

Follow this guide and attach the logs…not copy and paste http://forum.avast.com/index.php?topic=53253.0

AdwCleaner
Malwarebytes
OTL
aswMBR

when done the the removal experts will be notified. It may take hours before one arrive so be patient