WinAntiVirus is itself an adware- malware ap.http://castlecops.com/postt41389.html
If you can uninstall it in "Add/Remove Programs" do so and install AVG or another of the good freeware anti-virus aps.
If you cannot uninstall it, download Startup Inspector or use msconfig to disable it from starting until it can be removed.Start Menu Program Control:
StartUp Inspector (Enables novice and expert users to manage Windows® startup applications) Startup Inspector is easier to use than msconfig: Antivirus programs - freeware
(you can only use one resident anti-virus program on your computer. More than one will conflict)
Avast Anti-virus freewarehttp://www.komando.com/bestshareware.asp
Run both Adaware and Spybot Search and Destroy from safe mode, updating each program before you scan and setting both to fix what they find.
*AdAware SE: http://www.majorgeeks.com/download506.html
*Spybot S&D: http://www.safer-networking.org/en/index.html
Following that that I suggest you post a “HijackThis” log for expert assistance with your problem.
Read the pinned post in our “HijackThis” forum, herehttp://www.bleepingcomputer.com/forums/t/34773/preparation-guide-for-use-before-using-malware-removal-tools-and-requesting-help/ Carefully read and follow all directions explicitly.
Following instructions run a log, and post it in following HJT forum, at this linkhttp://www.bleepingcomputer.com/forums/posthjtlog.htmlDo not as yet attempt to fix anything by yourself using Hijack This as even what may seem to be a small mistake can render your op system inoperable.
Some files when in one folder may be fine while in another may be malware.
A member of our HJT Team will analyze your log, make recommendations and offer assistance.
It may take a period of time to get a response to the log you posted because the members of our HJT Team are kept very busy. Please
be patient as this team is manned by volunteers. They will help you as soon as possible.NOTE
Once you have posted your HJT log, please DO NOT make any additional posts in the HJT forum thread you created until you get a response from a member of our HJT expert team.
The first criteria they have when looking for logs that need replies are posts showing 0 replies
. If you make an additional post, it will show as having 1 reply
A team member, looking to see if a reply has been made might well assume another HJT Team member is already assisting you and might not open the thread to respond.
So, make your post and wait for a response from a team member.