I can see two courses of action at this point - the first would be my favourite from
the little information we have:
1. Back up your data (I'd do that anyway) and use the Dell recovery partition to
re-build your PC.
2. Run MalwareBytes a few times, also SuperAntispyware more than once. Get CCleaner
and run that too. If you still have problems either go to a dedicated malware forum
(post back if you want links) or revert to 1.
Whichever you choose, you need to work differently to cut down the infections in
the first place - some thoughts on that:
* Use Firefox instead of IE
* Install SpywareBlaster
* Run MalwareBytes and SuperAntispyware scans regularly
* Run CCleaner regularly
* Think about the Internet sites you visit/the mail attachments you open
. . . otherwise you will be straight back to having a crippled PC.