Hi, I am trying to install office 2007 ultimate in my system. when it reaches about 75% it rolls back and gives error 1402: cannot open registry key, check your permissions. i opened the registry editor and given the permission to specified keys but it keep on giving it for several registry entries. It is frustrating. even i tried to install as administrator/run as administrator but keep on getting this errors. What could be the possible reason and what is the simplest solution for this?

Doing a "RunAs" can sometimes help with permission issues, but generally not when installing software, because so many registry keys need to be changed. Are you logging in as an account with administrative credentials (such as the Administrator account)? It sounds like you might not be...

Did you search the MSKB? I found this: http://support.microsoft.com/kb/838687 "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown

Hi, Even when i run as administrator it still gives that message. that is the problem. The KB link looks good solution.I will try and let you all know.