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#51
Work through these Troubleshooting Steps for Windows 7 to go over the install most thoroughly.
If nothing turns up compare the installs you did with the perfect install compiled in Clean Reinstall - Factory OEM Windows 7 based on what's worked best in tens of thousands of installs we've helped with here.
You can do a diagnostic installl where after Win7 install per the tutorial to a HD wiped with Diskpart Clean Command, enable Automatically deliver drivers via Windows Update (Step 3) and first install only the Drivers from Important and Optional lists, then check performance using the game which crashed before. If it crashes, System restore to before the drivers install to test again, then install the drivers singly to pinpoint the one causing the crash.
If no crashes, next install the rest of the Updates in small groups testing performance after each group's required reboot. Then continue checking for Updates until all are installed in the same small groups with performance tested between each.
Next import the drivers still missing in Device Manager testing performance between each one.
Then install programs one at a time using the same method testing at length after each one, ready to use its restore point if a crash.
This can pinpoint the driver or program causing the crash.
If it crashes before anything except Win7 is installed to a wiped HD it pretty much has to be hardware unless a subsequent driver or Update delivered as prescribed smooths performance as some do.