computersplus said:
click on the start orb and in the search box type event viewer click on the link provided in the search results when it opens look at the Windows logs on the left then in the center window look at system events that's usually where the serious errors will be also check the application logs look for errors flagged in red post the event ID numbers
OK, the BSODs are back. 2 today.

Event viewer shows red Event ID 7000, and text 'The PDIHWCTL service failed to start due to the following error: The system cannot find the file specified.'

It also shows Event ID 11, and text 'The driver detected a controller error on \Device\Harddisk4\DR4.'

How do I tell what is Harddisk4? In Computer Management, Disk4 shows up as my external drive. Would that be it?

Any ideas on that?