If you did a Custom install for CCleaner instead of the normal install, then it prompts you (gives you boxes to check/uncheck) if you want things installed...like the Ask Toolbar, eBay Toolbar. Those are the ones to watch out for. You can always uninstall CCleaner and put the slim version in, but if you uninstall, I'd recommend doing it with Revo since it will remove ALL traces of these toolbars, which can be difficult to remove. The normal way to remove CCleaner is Add/Remove Programs. If you installed the normal way, you may see "Ask" in one or several of your browsers.
If you are comfortable with History_Killer_Pro and Registry_Mechanic, then leave it. You probably don't need TFC at this time. Just don't go over kill on too many security programs.
Regarding the Microsoft Net Framework, you have nothing to worry about. Just let MS Update take care of things from that point of view.
It sounds like you have a problem with Acronis though. When Dell did the factory Image Restore, did they do anything to Acronis? You may want to give them a call to find out? Have you used Acronis since doing the major repair on your machine and if so does it work properly? If not, you may need to uninstall and reinstall. Clean your machine up first, then do a System Restore before you uninstall so you have something to fall back on.
Any Acronis users have any feedback to offer on this (see OP's previous post for problem)?