I have 2 PC's Dell Optiplex 760 that were purchased in April 2010. They came with Vista Business license but XP Pro installed on them, so no direct upgrade.
This past weekend I wiped the HD's and installed Windows 7 Professional SP1, purchased vol license from MS, downloaded the ISO and clean install on the PC's
After the installation occurs and a few Windows Updates, I am finding that there 2 PC's have started to only "work" when I move the mouse around. For examply I was installing Office and noticed the progress bar not "progressing" When I moved the mouse around, I saw activity light on the PC and started seeing the progress bar move. Let go of mouse, and it stalls out, move it and it continues the install.
I opened task manager and noticed that the CPU Usage History graphs were not moving, but when I moved the mouse, they started moving...
So something is amiss here...
Also they both have 4GB of RAM.