Last week, I noticed my computer slowing down gradually. Eventually, the cursor would lock up and the disk light would stay on continuously. Figured there was an infection, so decided to re-image (Macrium Reflect) but got the ol BSOD because I'd switched to Win10 without updating the recovery disk. But I can deal with that later.
In the meanwhile, two other Win 7 machines (as well as one of NASs seem to be infected both Linux boxes). This particular machine seems to be running normally, but when I try do down load the Malwarebytes Rootkit remover, I get an error window stating: "Could not create file "C:\Users\[use your imagination]Desktop\mbar\mbar.exe". Which seems very suspicious. Or is it? Previously, I've installed it and have never seen this error window pop-up before.
I also use Malwarebytes as well as ESET Internet Security, as well as Spybot and the scans have turned up nothing.
So how can I tell I've been infected or not?