I just got the 701 model and have the same issue
fresh install of win XP, installed original driver disk and nothing, idownloaded latest driver from
http://www.eeti.com.tw/web20/eg/drivers.htm#xp and installed it, touchscreen seems to work for first 5 seconds of windows then dies
I might try a quick format and install the latest drivers fresh on windows without the old drivers...... its kinda frustrating, have searched the forums for hours and cannot find a straight answer for this problem