Avast, or Avira both free from www.filehippo.com
If you have an online bank account with Barclays, you can get Kaspersky free
For removing AVG, theres a removal tool available for downloading.
Useful software for removing virus
1) boot machine into safe mode
power on and start pressing the F8 key until the menu comes up
Select safe mode with networking, from the menu
Once the machine is up and running
2) Download Emsisoft emergency kit, install, update it and run a DEEP scan
http://www.emsisoft.com/en/software/eek/
3) Download malwarebytes install, update and run a FULL scan
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