BCC 0xD1 indicates a driver problem (DRIVER_IRQL_NOT_LESS_OR_EQUAL). Have you updated any driver lately? Have you installed an Windows Updates lately? Have you added or removed any hardware lately?
This could well be related to the strange game issue, you may have picked up some malware?
If you've not changed anything and a malware scan doesn't reveal anything nasty I'd suggest a clean reinstall as your best option. Your OS seems to be in a less than ideal state...