Does smell like a virus, try running a different scanner, also make sure they are up to date as an out of date virus scanner is like using a toothbrush to clean your car (it doesn't work).
You may also want to run a spyware adware program such as ad-aware.
It might also be helpful to try and recall if you did anything before this started happening, installed software, browsed a dodgy website etc
Might also be an idea to check the entries in MSConfig and Windows run in REGEDIT but don't just untick or delete them as that won't fix the problem, just hide it from you.
I'd also check for rogue processes in task manager. You might also want to do a search without the .rom (
http://www.google.co.uk/search?hl=en&q=wingzn32) which does highlight some stuff that sounds like what helmut mentioned.