Are you doing a hardware repair or software repair?
If your data is on a separate partition from the Windows installation, I'd suggest encrypting that partition with something like BitLocker (available Windows 7 Pro & Ultimate, Windows 8 and 10). That way the repairman can boot into Windows normally, but he cannot access your data without the encryption key.
I think hardware as it's the casing and screen of the laptop that is falling apart. Although, they asked for login info to the computer if applicable so software checks may not be out of the list. I think all my data is on the C partition. I don't see any other partitions except D for the recovery drive that comes with HP machines. This is a Squaretrade plan if you've ever heard of the company.
Edited by aworrier, 21 December 2015 - 08:21 PM.