A system restore was not needed.
Simply running GrimeFighter again and undo the changes would/should have solved the problems.

There is no need to salvage data from the drive if you where smart and had a backup of the data and/or a image of the drive.

If the documents are too late, you are responsible for it not avast/GrimeFighter.
I hope it will never happen to you, but what if your house gets on fire?
What do you think to do if your hardware dies?