Thanks. I have done several of these in my attempt to solve these problems. I have used a registry cleaner (Registry Booster), checked for spyware, malware and viruses, tested memory (bought new and tested with it), constantly updated video drivers
, have the latest service packs from Windows, and removed Norton Antivirus all to no avail. The only items left are the DEP and printer drivers and I believe that I had these problems before I installed the printer drivers.