Here, read here, I don't want to copy paste entire page:

http://www.speedguide.net/faq_in_q.php?qid=247
cvrle77 Reviewed by cvrle77 on . Speed up your windows RDP If you are on windows 7, or windows vista, and remote control a desktop, I've just found, and applied this command: netsh interface tcp set global autotuninglevel=disabled open cmd, and copy paste this command I got amazing speedup on refreshing my screen, even with 2 RDP connections opened. No more pain of drawing interface. You apply this on YOUR PC, not RDP. ;) Rating: 5