I had 2 user accounts on my pc one was a administrator user and on was a standard user.
and I deactivate the administrator account so I am left now only with the standard user and i have no way to change it back.
Similar idea to #1 (looks fairly simple):
http://en.kioskea.net/faq/29289-win...If you invoke the super-administrator account, do system restore, then disable super-administrator account, it might get you out of trouble. I cannot vouch for this personally but it seems the alternative might be re-install Windows or do a Factory Restore.
Always pop back and let us know the outcome - thanks