If you are troubleshooting a blue screen error (aka BSOD/STOP error), the following tool is extremely helpful in identifying the problem. It parses the memory dump file that is generated when the error occurs and makes it easier to identify the source of the issue. Note that the tool can be used to retroactively analyze previous errors.
The system must be configured to generate the dump for this to work (this is typically enabled by default). Open Control Panel > System > Advanced System Settings > Advanced tab > Startup and Recovery settings as seen below to configure/confirm.