Disable Game DVR and Game Bar: the registry values and what they cost you
SHORT ANSWER
Disabling Game DVR sets GameDVR_Enabled to 0 under HKCU\System\GameConfigStore and AppCaptureEnabled to 0 under HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\GameDVR, with AllowGameDVR set to 0 as a machine-wide policy. It stops Windows holding GPU encoder resources for background recording, which recovers a small amount of GPU time and removes a common source of stutter on lower-end cards.
Exactly what it changes
Read straight from the application source. If a tool will not show you this, it is asking for trust it has not earned.
HKEY_CURRENT_USER\System\GameConfigStore
GameDVR_Enabled = 0
Turns off the per-user Game DVR capture pipeline.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\GameDVR
AppCaptureEnabled = 0
Stops background app capture.
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\GameDVR
AllowGameDVR = 0
Machine-wide policy so the per-user setting cannot be re-enabled silently.
HKEY_CURRENT_USER\System\GameConfigStore
GameDVR_FSEBehaviorMode = 2
Disables Fullscreen Optimizations, forcing true exclusive fullscreen for lower latency.
What it does
Game DVR keeps a rolling buffer of your gameplay so the 'record that' shortcut can work retroactively. That buffer costs GPU encoder time continuously, whether or not you ever save a clip.
The Fullscreen Optimizations value is separate and often more valuable: it stops Windows silently converting exclusive fullscreen into a borderless-windowed composition, which adds a presentation step and latency.
When it helps
- Frees the GPU hardware encoder, which matters most on lower-end and laptop GPUs.
- Removes a documented cause of periodic stutter in fullscreen games.
- Forcing true fullscreen shortens the present path, reducing input latency.
When it hurts
- The Xbox Game Bar recording shortcut stops working. If you actually use it to clip gameplay, do not disable this.
- Some games use Game Bar for widgets or achievements overlays.
- Disabling Fullscreen Optimizations can cause slow alt-tabbing in a few older titles.
How to undo it
Set GameDVR_Enabled and AppCaptureEnabled back to 1, delete the AllowGameDVR policy value, and set GameDVR_FSEBehaviorMode back to 0. Or re-enable capture in Settings > Gaming > Captures.
Verdict
Worth doing for almost everyone who does not use Game Bar to record. If you clip your own gameplay, use an external recorder instead and keep this disabled.
Related guides
Everything else we change is listed too
All 127 optimizations are published in full, with what each one does and which are free. You can apply any of them by hand using pages like this one — the tool exists to do it in one click and put it back after every Windows update.