FYI the launcher has nothing to do with game checksums or achievements.
I don't know what can be changing your checksums on reboot, nor deleting some file that Steam then had to re-acquire. Conceivably that could be an antivirus app doing something wrong, a Windows or file system problem, or even malware.
Anything changed in that area on this machine of late?
I don't know what can be changing your checksums on reboot, nor deleting some file that Steam then had to re-acquire. Conceivably that could be an antivirus app doing something wrong, a Windows or file system problem, or even malware.
Anything changed in that area on this machine of late?