It is highly recommended to use a secondary (alt) Steam account when running Steamworks fixes to mitigate the risk of account-level restrictions.

Coghlin squinted at the screen, distrustful of the text as always. He was a man of levers and valves, of tactile feedback and intuition. To him, this "fix" was a ghost story. "So the Master Cylinder will hold?"

Steamworks Fix Activation Verified – What It Means & How to Confirm