this is become incredibly annoying, every single time I launch gmod. It says validating steam cache files. I can run it fine after it validates of course, but if i restart steam and double click it again, the same thing happens -_- anyone else getting this problem?
you could try: Here is the permanent fix: Delete clientregistry.blob and appstatupdate.blob in your steam folder.
or: Let the validating finish, take a backup using Steam Backuptool, then restore the very same backup you just took.
– Or send an e-mail to steam maybe they’ll help:P