your question is pretty vague for me to answer it.
What is the distance between you and this other computer? what are the connection speeds? who is on the wireless side? how far away are you from your wireless router? how much RF interference or physical obstacles are there between you and the router? are you on the same ISP?
2005 Martin DX1R Dreadnought, 1994 Fender USA Lonestar Stratocaster, 2005 Gibson Firebird Studio, Aria Acoustic 4String Bass, 25W Fender Champion 110, 100W Peavey Linebacker Bass Amp, Crap Amp, Lots of Boss Pedals