Try this and it shoud fix your problem.
Firstly, download AVG the free version (Google AVG)
This will work fine provided you combine it with a strong anti-malware and spyware set-up.
Follow this below and youll do that as well as cleaning up your machine:
Hit Ctrl+Alt+Delete and open the task manager.
Stop all processes with a bunch of numbers in them.
Go to Start>Computer>C: drive>Program Files>Temp files, and delete them all.
Empty the recycle bin.
Then go to Start>Run>type %temp% and delete all of those.
Empty the recycle bin again.
Then restart the computer, tap the F8 key while it is booting up, then choose "Safe mode with networking".
Download Malwarebytes from here:
http://malwarebytes.org/
When it asks you where you would like to save it, change the "mbam_setup.exe" file to xxxxx.exe.
Then install it, update it, and run a full scan. Get the free version.
Now download SpyBot Search and Destroy from here:
http://www.safer-networking.org/index2.h…
Update, Immunize, then scan & Fix.
Good Luck