I tried the three method on the Window 7 forum. The last method produced a file of what had been changed. It was blank. I then diconected my backup drive that also has an OS windows 7. The problem when away. Apparently C:windows 7 can read the operating system on supplemental drives and thus produced the error
I click on Control Panel-System- System Properties-System Protection-System Properties- I get the error message "There was an unexpected error in the property page: Catastrophic failure(0x8000FFFF) Please close the property page and try again"
0x8000FFFF