Host integrity policy - unable to find c:\pagefile.sys

Hi - I'm probably doing something stupid here, but am working on a test HI policy to identify clients not rebooted for more than 60 days.

I have attached the policy requirement - it's a 'compare file age to' operation and the target file is c:\pagefile.sys, but when testing the policy it fails because the file is not found (screenshot also attached)

Am I doing sonething wrong, or is there an issue with HI checking files like this?

Thank you

Kevin