Sounds like you do have a virus. The task manager not opening thing often goes hand-in-hand with LW popping up (or LW error messages popping up, if you've tried to uninstall) all the time. Have a read of the thread below, it has a lot of info about virus problems & various fixes that have worked for some people:
WARNING: Viruses on the network you should be aware of

For the popping up problem, there's another fix here which has worked:
http://www.gnutellaforums.com/showpo...&postcount=141

If these don't work, or if you don't feel confident about trying the fixes, you can always go to Norbiesworld & get some free computer help. If you go to the site, register & follow the directions for free computer help, Norbie will be able to check things out for you:wink: