Shortly after user logon to the Windows XP SP3 system, the mouse pointer freezes in on position on screen. Moving the mouse appears to move the effective position of the mouse and all the changes of shape & animations happen, but the position of the mouse pointer remains fixed. Happens both with MS Standard Wireless Optical Mouse and Wacom Bamboo tablet. Both of these have been installed for some time. Both are USB. Virus check, Spybot and AdAware don't show anything unusual. Problem does not occur when logged on as administrator in Safe Mode. I'm trying to install the latest Intellipoint & intellitype from Microsoft but all is going very slowly.