What is validating steam cache files

Many problems might be caused by corrupted game files, e.g. If you have encountered such issue, please verify integrity of game cache and load game save file made before this issue occurred (if possible).

From the Library section, right-click on The Witcher 3: Wild Hunt and select Properties from the menu. Select the “Local files” tab and click the “Verify integrity of game cache…” button. Steam will verify the game’s files – this process may take several minutes.

When you try to launch the game again, the game will be fixed if Steam finds anything wrong with it and should be fully operational!

Instead concentrating on one word that said refund.

As I type it's just jumped to downloading what looks like 2GB of presumably missing data. GTA V is crashing about 20 min into each gameplay session.

I owe you a drink :) @Chief Potato Salad Please help.

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.