InTechSpot  

Remote Desktop ConnectionAn interesting feature, on Windows XP, is the ability to be remote controlled from a second PC: the so called “Remote Desktop Connection” can be used from a dial-up connection or in a local ethernet network.

XP (and Media Center Edition), differently than the Server versions of Windows, has a limit: a single PC can be controlled by a single “local” user (the “real” person on place), OR a single “remote” user. If someone logs into the computer from remote, the local user is disconnected. The following procedure deactivates this block and allows multiple persons to connect and to use a single computer from remote.
Very useful, for example, if you’ve a very strong PC and you want your wife/friend/brother to use an old computer like a “terminal” to use applications on the new one, at the same time of you. Other application of the same technique: you’re at work and you want to connect to your home PC, without blocking your wife that is using the same computer to check email ;)

UPDATE: it seems that XP is limited, also after this modification, to 3 concurrent users. So don’t waste time trying to raise the maximum number of connections over three (see step 5) because, at this time, I don’t think there’s a way to use the same XP PC with more than 3 persons at the same time (e.g. a local user and 2 remote users).