So you got Properties on your "My Computer" icon and went to the User Profiles tab and deleted the one that said "domain\administrator"? Were you logged on as the administrator when you did that? If you were, the copy of the current profile in memory would have been rewritten to the system and the problems you had would be there again on your next logon. Give another account admin priviledges and then log on with it. Delete the admin profile as above. Then log off. Log on as Admin. See if the problem persists. If it does, then you have a problem with the Default User profile, and not the Administrator profile. Try creating a brand new account and logging on with it. If it's screwy, you know for sure that it's the Default Profile, since that's the template used to create every new profile.
If the DP is screwed, then you might be able to copy that folder from another system and overwrite the bad one. I don't think there are any critical SID's or mappings involved, as long as the basic build and drive path configurations are the same.
Hope this helps.
ShackDaddy