I have a Windows 7 64 bit client on a SBS 2003 domain. About one week ago I began to have problems with Outlook 2010 and after several hours of trying to fix it decided to reinstall office 2010 Professional. I apparently uninstalled successfully, but when I tried to reinstall I got a "Error 1402 setup cannot open the registry key" I contacted Microsoft support which took control of my computer and ran scripts to completely uninstall office. (Some residual signs of office remained however) They attempted to reinstall office themselves but got the same error. They attributed the error to the machine having been on a domain, and had me remove the machine from the domain, create a new profile, and reinstall office. However I got the exact same error. At that point MS support said they were consumer tech support and not trained to handle a machine that had been on a domain.
When I tried to open the keys reported in the error 1402, I had to take ownership in order to give myself permission. There were dozens of such instances. I tried converting them all and some subsequent directories that showed up as access denied errors, all requiring me to take ownership, and eventually got installer to run through and report success. However, when I tried to open any office application, I got a message that the computer was not configured to run the application.
I subsequently used restore point to go back to the state where I was receiving the error 1402. Unfortunately the computer does not display restore points going back earlier than the problems, I think because it ran out of room on the disk.
Is there anything I can do, or do I have to reinstall the operating system and start over? It would be painful.