I knew instantly it was something installed in my computer since that specific credit card it's for internet use only and I pay using only trusted sites. So a rootkit or something.
I used a couple of malware and rootkit detectors and as I thought both detected some malware.
Also (lucky me) around the same time my external drives started to fail due corruption. They are new so this was suspicious.
Since then I've done the following:
- Re-installed the system.
- Got a Malware bytes license and a couple of malware/rootkit scanners (Sophos virus removal tool and Kapersky's TDSSKiller) working along my Microsoft Security Essentials.
- Got Spinrite 6.
- Installed SRW Iron instead of Chrome because the added security options and because it comes without the Google extra crap.
- Installed Lubuntu in a spare USB thumbdrive as a banking only OS. I installed Lathe on it (Linux equivalent to Deep Freeze) to add an extra layer of security (Linux has malware and rootkits too).
What else do you suggest I can do?