I downloaded and used a Registry Cleaner which was supposed to back up my files; too late I found that I had deleted some important files and now I can't recover them.  It is hard to even get online because I keep getting a message box that says "RUN AS".  Inside this box it asks who I want to use this computer, and even locks me out.  I tried to use System Restore but it won't allow me access.  What can I do?

If you have an installation disk for your Windows version, boot from the disk. When the dialog comes to the choice of what you want to do, choose repair. This should fix the damage to the Windows installation.
If you deleted files from your ISP installation, you may have to reinstall it also, assuming you have the disk they provided.

   Are you talking about our program, RegVac Registry Cleaner?
   I often get calls from people who have used a program called Registry Cleaner and assume that it is our program but it is not.  Our program is called RegVac Registry Cleaner.
   From what these people have said, Registry Cleaner is not a good program and it's producers do not tell you how to get ahold of them.
   If you have a backup of the registry made before you ran Registry Cleaner, restoring that may correct your problems.  Our programs, WinRescue and RegVac (see our website at http://www.superwin.com for more details) make backups and restore the registry.

I've used the same cleaner and lucky for me I keep a zip.folder of "recover my files" I
use only in emergencies because registry cleaner.., cleaned out most of my .dll files
it is great for finding deleted or lost files....you can get it at "GetData Pty.com".