Wanna know where you have been?
For Win 7 computers,
open regedit
navigate to
HKLM/software/Microsoft/windows nt/currentversion/networklist/nla/cache
It shows places that I haven't been for over a year. CCleaner should offer to clear them.
Next
HKLM/software/Microsoft/windows/currentversion/homegroup/networklocations
might have some information that would be better unshared
Next, more information about where the laptop has been is at
HKLM/software/Microsoft/windows nt/currentversion/networklist/profiles
also look at the two categories in profiles (next major key)...again, there is a trail.
Another worrisome key to laptop tracing is at
HKLM/software/Microsoft/windows nt/currentversion/networklist/nla/wireless
However, I cannot decode all of those keys, but I suspect that a trail is in there.