Deleted Reg Key or Value--Help!

> Hi all, recently I was ridding my computer of obnoxious
> spybots, etc. (over 400 after one sitting!), and found I
> had to run RegEdit and delete a Reg Value (or maybe
> Key?...not sure). Unfortunately, I think I deleted one
> entry by mistake. Now my IE will close itself and give me
> the following error (this also appears after I close all
> IE windows after a long session)
>
> ------------------------------
> Microsoft Visual C++
> ------------------------------
> Runtime Error!
> Program: C:\Program Files\Internet Explorer\IEXPLORE.EXE
>
> R6025
> -pure virtual function cell
> ------------------------------
>
> also, I now get an excessive amount of popups while
> online, though I realize that everyone will get a pop up
> or two while online, before this incident I was able to
> keep it at 1 popup on only certain sites using a standard
> Pop Up guard (the MSN or Goggle toolbars). When I deleted
> the Reg value (or key?) my pop guard toolbar deleted, and
> when I went to reinstall it I was told that toolbars had
> been disabled. I enabled it and reinstalled, but it has
> not been working like it use to.
>
> another, sort of off topic annoyance that I've had is
> that everytime I boot up my computer before my desktop
> fully loads my System32 folder pops up. anyway I can stop
> it from doing this?
>
> if anyone can offer help (like maybe a way to get my Reg
> value/key back!! lol) I would be much obliged
>
> thanks,
> anna (starryeyedgirl@hotmail.com)