It appears to compare checksums of your local files with the cloud and will re-download any invalid files again.As to why the validation is happening automatically after updates download for these two games.It does not keep the game(s) from working.2) Fallout New Vegas game issue: Fallout New vegas is bugged. There are other places on this forum where users have had issues with vendors - you may want to do some searches.Well, I've played over 50 hours with not too many problems: the screwed over Quicksave/Autosave issue, occasional crashes, lot of clipping seen, but overall it ran OK until this issue.
Both were free and both download updates incessantly, so I uninstalled them.
I've been aware of the validate steam cache files for a while.
You can do it manually from the properties tab by right clicking in the game list.
Are you saying that the "Verify.." routine of Steam doesn't work correctly?? new info: checked the Game file : Install is failing file, other 431 ( minus 1??
) files apparently OK per this routine If you run a Verify of FONV do you get same results??