I have been having a very bizarre and frustrating ISSUE with my computer for at least one year.  At least once or TWICE a day, the screen will blink, flash, or however you want to refer to it, and parts of web pages will disappear and become unresponsive.  I then have to restart the system to "clear" it, or WHATEVER it does for it.  This strange behavior also occurs with my laptop, so I know it's not just an issue with my PC.  I swapped out my modem several months ago, but that didn't resolve anything.  My ISP sent a technician to my residence last week, and he installed new cables, connections, etc. but it still hasn't resolved anything.  The tech suggested that if that didn't resolve my issues, that it could be something in my home electrical system that is causing it.  What is your opinion on this strange issue?  Could it be something in my home electrical that is causing it?  Should I have my electrical system tested for shorts or interference?      Thanks for any insight anyone can offer into this strange behavior.  I am at a loss as to what to try next.Seeing as you have a portable laptop take it to another location where a KNOWN wifi service is available and see if it performs properly in regards to the issues you are having at home. truenorth This sounds like a PROBLEM with the Graphics Card.Tried running in safemode yet?Not impossible but would be quite a coincidence. "This strange behavior also occurs with my laptop,". truenorth