No one else uses my PC. My GF is not computer very literate and wouldn't know how. I am Mortartube and have been posting here for years. It was never my previous name. I have always been Mortartube and used the same e-mail address. That's why it all seems so odd.
I can log in as Mortartube, then come back to the site a few hours later and it says "Welcome back Eram or Blythe" in the last few days. If I remain logged in for a few hours my name and e-mail address will change and it will say "Welcome back (Random name).
This is what is puzzling me. Spyware and anti-virus scans do not show what may be causing it.