I have a computer virus and don't know what to do and what not to do. I am pretty computer illi

When I got home from work there was a small pop up screen on my monitor that said ANIOApi with an error message (the D-link symble very small in the top corner). My babysitter had downloases some stuff off myspace and other sites. I kept trying to close the window and it would close for a second and then open up again and again. I have AVG free and it doesn't detect anything but my comp. is beeping every few seconds even with nothing running and is very slow. When the windows task Manager is up and no programs running there are 1 or two programs whose mem. keeps going up quite fast. Not sure what these programs are for. I am wary of free downloadable antivirus programs not sure what is safe people told me they can give you viruses to. "You don't get anything for FREE." What should I do?

I have a computer virus and don't know what to do and what not to do. I am pretty computer illiterate. HELP.internet security 2006

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AV/ Spyware / Firewall software.

Get the following, all are free for a safe surfing experience, with proven track records and do not take up

system resources like Norton or McAffee.

install in SAFE mode with networking ( hit F-8 at boot time ), run them all in SAFE mode