System: Windows 7 Pro (32 bit); NIS 510 Video card with 2 monitors attached
The desktop display randomly updates. All the icons, including the task bar, turn white, the screen flashes and the icons redisplay as normal.
This happens frequently, every minute or less, but not in a discernible pattern.
Also, sometimes the cursor switches between programs. Not always with the display update. The switching can occur in mid-type, so to speak. For example, I might be entering data into a cell in Excel and the input will stop. Sometimes, I find the cursor in another program, but most of the time the cursor is just lost until I click back where I was working.
Any suggestions as to where I start looking for the culprit?