Weird.
Wc3 works just fine on my Vista. Then again, I had to purge it a few days after I got it because Magos' editor did something to the file types settings and so whenever I double-clicked on a folder it tried to open it in Magos'...
Then I had to reinstall all the drivers...
Even before I nuked it
wc3 still worked fine. Weird.
It's Vista Business by the way. Don't ask why.
The only bug I've found is that whenever you click on anything in WE it beeps. Very odd.