Thanks Wombler, in other words, the two times this happened, someone from anywhere "Not using my computer" signed in to search for the same thing I was.[/QUOTE]
You're more than welcome. :flower:
I was thinking more of another family member or a guest in your household logging in.
If someone has logged in without having physical access to your PC then it may indeed be compromised.
Check in the control panel to see if remote access has been enabled.
If it has then disable it.
Then also run a full virus scan with whatever antivirus software is installed on your machine and then a full anti-spyware scan with different software (something like SpyBot Search & Destroy) and see if anything shows up.
Don't forget to update the signatures before doing the scans.
The experts here may have additional advice for you also.