Sometimes software improperly enters a key in the registry.  RegVac removes these improperly entered keys, as it should, but often in doing so the software that entered the bad key will not work.  To keep RegVac from removing the bad key follow the instructions below.

If the Classes Vac or the FilesList Vac removes an entry in the registry that keeps one of your programs from running (it happens but very, very rarely), find the offending entry in the undo file in the Vac Bag.

You will need to narrow down exactly which keys are causing the problems.  If the undo file is huge, you need to make a copy of the file, open it with Notepad, and remove half of the entries.  Then close it and double click on it (this will put those entries back in the registry if the file has an .reg ending).  If your software works, the bad key is in that file.

If the software still does not work, then the bad entry is in what you removed.  Put the removed entries in a blank file, give it a .reg ending, and remove half of its entries.

Keep doing the above actions until you figure out exactly which entries are disabling your software.

If the undo file is small, you may be able to figure out which entries are bad by opening the file with Notepad and looking at the names of the keys.

Once you have found the bad keys, copy them into a new file (they must have the same format that they had in the undo file) and call that file redo.reg.  Put redo.reg in the RegVac directory.  Before entries are removed from the registry by RegVac, RegVac checks this file and does not remove the entries in it.