Keylog scanner?

Hi all.

I've just noticed some strange stuff going on in my eBay account. I have changed my password but I'm worried about how someone may have gotten it because I never open phishing emails.

I'm concerned that I may have a keylogger on my pc.
I've never dealt with one before so can anyone recommend me some software to scan for one? My anti-virus (AVG-free) and spybot find nothing. I also have Windows Defender and Spyware Blaster installed.

I may be wrong, I hopefully don't have any unwanted software on my pc, but I'd like to know for certain and any help on the matter is very much appreciated!

Thanks!

 

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