Hmm, this seems pretty random to me, then... it
might just be that your system has become confused a bit, something a reboot would fix. However, it might also be that there is another problem, be it hardware or software (viruses?). PS is known to have issues (including not working on some systems), but the change in what error you\'re getting might be indicative of another reason.
In any case, you should make sure that your graphics drivers, the DirectX version and PS itself are most recent.
If you get a dump file, you should
send that to the devs.
Maybe if you post your system specs there is something obvious that\'s lacking...