Question about- uh, either a trojan or a worm.?

I have some sort of virus. McAfee said it was a trojan but I didn't catch the name because I closed out of the window making the foolish assumption that McAfee was smart enough to, yknow, keep logs of the files it quarantines. (It only keeps logs of times that it blocks programs acess the net, apparently.) McAfee also did another system scan after quarantining/removing the trojan, and it came up clean.

Buuuuut something is still blocking my acess to Trend Housecall online, as well as some sites about the worm Ahlem.A, which McAfee never said ANYTHING about. Aside from these blocks there are no obvious problems with my computer.

So. How do I know if this is the worm, a trojan, or both, and how do I find out from something more reliable than McAfee (web-based, preferably) if it's still here or if this is just the after-effects of it altering some file?

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