It worked and SLSV is back up and running, along with control panel and all the other things that wouldn't work. Please note that I had had this issue in the past and I was forced to reinstall Vista 64 bit. I'm ecstatic that there's a fix for it now! http://social.microsoft.com/Forums/en-US/genuinevista/threads/ Thanks very much Darin!
In the post you suggested that the problem may have come from using a Registry Cleaner. I used Eusing Free Registry Cleaner downloaded from here : http://www.eusing.com/free_registry_cleaner/EFRCAwards.htm and my problems (i.e. no control panel, etc) started today, which is no more than 72 hours after using Eusing Free Registry Cleaner for the first time on my current Vista64 install.