Windows Installer running by itself, preparing to install task

> Hello Newsgroup helpers. I have been using various
> registry fixers lately, and had to rollback to an earlier
> date, because (apparently) I had deleted a device driver
> which allows my computer to receive wave files when
> visiting a site which has audio and or video codexes for
> information sharing online. The new problem, after
> rollback was accomplished, is where the Windows XP
> Installer now runs as a task in and of itself, and I have
> no idea what it is preparing to install. The Event log
> shows various wierd items- such as service control
> manager being activated, which in itself isnt bad I
> suppose- but here is another anomalie.. my system now
> shuts itself off usually in early am around 3am or so- (I
> do have CPU Cool installed, but since I am not using it
> at this time, no system intensive tasks would heat up as
> to activate shutdown- maybe I have a unknown virus?
>
> Anyone who can assist, I appreciate- If this hotmail box
> is full, ((cc to this in case) use awareness21@yahoo.com)
> use the in bracket email. Thank you. (as a return favor I
> do free online lifestyle counseling). William