g2a.com - it is a rough price might be £7 might be $7
There are many antivirus tools out there, such as Symantec(Norton), McAfee, Avira, Avast, Kaspersky. Sophos i think is a decent product and its free...
Thanks for the heads up on Bitdefender. I will still give it a go but will keep a close eye on how the laptop performs, just in case.
I would assume that it was G2A.com. I just purchased a key from them for £5.89. Hope that helps.
I tried Bitdefender many years ago and it caused my PC to slow down and had "stability" issues. I also recently tried Bitdefender Free (months ago now), and encountered my PC having 'issues', after uninstalling and switching to Sophos Free, my PC resumed 'normal and stable' operations. I am now trying out Kaspersky Free which has not given me any problems so far.