Troubled_man, Welcome to this Forum.
by the sounds of it you still have Virus in your computer as well as few of those nasty pest

, don't be hesitant about removing anything from startup (except for Virus scanner and firewall software).
Use this software to scan your system once again (it is called spy sweeper):
http://www.spysweeper.com/download.html
plus, you may want to invest into a decent Virus scanner such as Norton Anti Virus (which does provide good updates).
As far as you IE setting and home page goes, those are effect of Pest and scumware in your computer (Spy sweeper will detect them and remove them). You could search for the name of those "hotsearch" in the registry and replace it with
www.google.com without any after effect.
shut down thing is a virus issue and you will need a good Virus scanner to fix that.
cheers