Never had a problem - but I,m holding my breathe!I checked the mentioned folder. I am not sure who "owns " it, but I do not use it. Mine is empty.
When I reinstall, I have a backup of my contacts folder, which I copy into
Program files (x86)\Windows LIve\Contacts. I have found this takes care of the "Contacts" in LIve mail, and the "select from Contacts", when you are sending mail.