Steam 2 Files Failed To Validate And Will Be Reacquired -

: Use the Windows CHKDSK tool to scan your drive for bad sectors that might be preventing files from saving correctly.

In those cases, the message is harmless — Steam is just being overly cautious.

Sometimes the server you are downloading from has a corrupt copy of the file. Switch your region in Settings to a different city and try validating again. Step 2: Address Permission Conflicts