kaspersky.com also has that option and other useless options. They use another company to handle the transaction for you and give you those other total money throwaway options. Just decline them all and click the download button from bitdefender official website.
You can keep Malwarebytes and Hitman Pro to run along with your antivirus, they are both design to be secondary security layer. For Avast Anti-Virus and AVG Anti-Virus you must choose 1 and get rid of the other one.
ComboFix doesn't work on Windows 10. I threw in the other remaining heavy duties on my last post. TDSSKiller for rookits. RKill for active running malwares. Then the other 3 to work effectively.
Can try your luck with this:
http://www.bleepingcomputer.com/download/tdsskiller/
http://www.bleepingcomputer.com/download/rkill/
http://www.bleepingcomputer.com/download/hitmanpro/
http://www.bleepingcomputer.com/download/roguekiller/
http://www.bleepingcomputer.com/download/junkware-removal-tool/
Check for unusual on Windows uninstaller and browsers extensions.
Try this:
http://www.bleepingcomputer.com/download/tdsskiller/
http://www.bleepingcomputer.com/download/rkill/
http://www.bleepingcomputer.com/download/hitmanpro/
http://www.bleepingcomputer.com/download/roguekiller/...
It is rare but I heard there are viruses that hide in motherboard BIOS to be able to survive a reformat. So its either that or your SSD. http://www.cnet.com/forums/discussions/can-viruses-be-removed-from-the-bios-281792/