You can't go back because the restore points are gone.
It seems some of the unnecessary files need the System Restore data.
Generally at this point there is nothing you can do to restore the data
unless on the slight chance the tool you used has an option to undo whatever
it did.
Be careful of unnecessary files, some are necessary for something.
--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar
http://www.dts-l.org
"lilrunaway45" <> wrote in message
news:7694B2EC-1205-4D61-A2D8-...
> After I cleaned up my computer of uneccesary files and did a defrag my
> computer is running terrible and I no longer have any restore points back
> to
> before I made that mistake. Why can't I undo what I did or go back to the
> prior month for a restore point?