worm_mytopb.a

hello i hav used this site once b4 n found it useful from others threads but now i am stuck. i am a little savvy with computers and like to think i know a little but obviously not enough. i recently downloaded a program and believe it had the worm - WORM_MYTOB.A attached into its exe. i use trend micro for virus scans and its constantly coming up in my scans and quarantine’s the file. i have researched it on the trend website but the way the tell me 2 delete it doesn’t work, it tells me to delete sum registry entries but they are not under the same name. since this my email has massive amounts of spam.
the program i tried to DL was a thing for a game Call of duty 4. and since this virus detection the program will not run even after a reinstall. any help wud b appreciated! i also use winoptimizer thinkin it wud pick up the registry entries if the worm was deleted by trend but did not. i am thinking the virus code is embeded in another file described by trend website but unable to know how 2 find.