Losing my (computer) cookies

Something is screwy with my computer. It keeps throwing away all of my cookies if I leave a site for more than ten minutes or so. I’ve got no anti-virus software running.

A second symptom is that one of my applications (a game) is having problems saving files. It just says “save failed” with no reason given.

Any theories?

The least hypothesis seems to be that your hard drive is filling up, but I think Windows (at least) will actively warn you if that is the case.

Check your free drive space.