MP - Good point, but the OP was talking about remoting *into* a Mac from a Windows machine, not vice-versa. ^_^
If the company allows it, you could always use a web-based service like LogMeIn. I've used it to remote into both Win and Mac from Windows, it works just fine, and the basic version is free (basic = no sound (I think), no Flash, no direct file transfers between the two systems (that's why I have an FTP server dammit), just straight-up "take over the Desktop/comp", but it functions as if you were sitting there at their comp otherwise). The only thing you don't get to see (unless they've fixed it recently) are the UAC popups in Vista/7 -- If those show up, you just get a static (unchanging, not "snow") screen until the user clicks it away.
"I'm not locked in here with you – You're all locked in here with me!!" - Rorschach, Watchmen
"It's called the Proving Grounds, not the 'I just assumed it would work grounds'." - rainkloud on XCOM 2
"Taking care of the fans who’ve gotten you here is often better than trying to bring in imaginary new ones." - Alan Costa, NIS (re: Disgaea)
"If I win, I get to be a king. If I lose, I get to be a legend." - General Tarquin, OOTS