|Download and burn to a DVD the Kaspersky Rescue Disk. It's a Linux based disk. It will load into RAM only. It will then go online to update itself; after-whcih it will scan the system fully and deal with anything it finds...|
It's a freebie and safe to use.
http://tinyurl.com/373ojxb (this link is to a more detailed how to use Kaspersky)
Having done that reboot the system and scan it with - in this order:
Junkware RemovalTool (JRT)
This installs to the desktop from where you run it. It opens into a dos style window - follow the instructions therein. It will reboot the system as part of its process.
You want the free version.
When you install each of the above three utils, use the manual/custom option. Do NOT use the automatic... Using Custom/Manual means you can uncheck any pre-checked boxes (so helpfully checked for you) and thus avoid installing all manner of stuff you neither need nor want. Some of it can a real PAI to get rid of.
Retain any logs generated as they may be useful here later...
The above utilities are safe to use; regularly recommended here - and all are "free".