Win32:winshow

I am infected by win32:winshow.I have virus scanned with Avast 4.5,Etrust and Panda none actually found the virus,but I am getting constant virus alerts from Avast on this virus.My homepage is changing on its own and items are being added to my favorites list.I have used cw shredder,avast virus cleaner,spybot and giant anti spyware scanners to no avail.I have done the safe mode cleanup-no help and when I get a hijack log and remove items from it ,they come back in a few minutes.This is really nerveracking.What can I do to get rid of the Winshow and browser hijacking???

Click on the link in my signature and do as explained in the “malware removal” section.