After Upgrading to V4 the mouse click in the windows environment no longer work. I can't click anything after the first 1 or 2 clicks and view changes. Re-installing does not fix the problem. Bootcamp and XP.
Possibly, Parallels Tools mouse drivers are at fault. Try re-installing them (axe the existing installation first, then reboot, just in case) and see if the situation improves.
Try using the latest build first: http://download.parallels.com/deskt...update1/Parallels-Desktop-4.0.3540.208607.dmg