Unfortunately, that did not work for me. Upon restart it was still blocked. I started it and went to preferences and the security center option was still unchecked.
In reply to SUPERAntispy:
No, I hadn't changed any permissions. After this installation, I checked the properties of SUPERAntiSpyware.exe. The SYSTEM and Administrators accounts had full control. The Admin account that I log on with was not listed. I added it with full control. No Joy (sigh!). Not knowing that much about permissions I hesitate to play too much. Although my log on account has full control, it shows and the SYSTEM is the Owner. Should I change either of these?
Thanks for your help so far