Unrecoverable Error?

The 0xc000001d afaik is an "illegal instruction" error, which looks pretty bad. I think the App binary has been damaged on you harddisk. Try stopping the BOINC client, remove the einstein_*.exe file from the BOINC/projects/einstein* folder and start the client again. It should download a new binary.

However it might not be the App itself that is broken, but also a broken system lib, ususally graphics driver. Is this error related to the graphics? What happens if you switch off the screensaver (and don't run the graphics in a window)?

BM