Thanks! It was the Mcafee software causing the problem...once it was removed the mouse works correctly.
firstdue
I have just purchased Multiplicity and its worked flawlessly between my two XP machines. I've switched them several times from primary to secondary and then back...and everything has worked perfectly. On one machine i installed a dual boot Vista/XP...and Multiplicity works fine when my second PC running XP is the primary...but when i switch Vista to primary (the unit that has to have a keyboard installed to switch between OS's) the secondary XP mouse movement is very choppy and unusable. Any s