How to Enable or Disable Fullscreen Optimizations for Apps and Games in Windows 10
Windows 10 introduced a new feature called fullscreen optimizations that is enabled by default. Fullscreen optimizations may lead to better gaming and app performance when they are running in fullscreen mode. However, some people have reported that fullscreen optimizations doesn't always improve gaming and app performance.
This tutorial will show different ways to enable and disable fullscreen optimizations for apps and games for your account or all users in Windows 10.
CONTENTS:
- Option One: Enable or Disable Fullscreen Optimizations for Current User in Advanced Graphics Settings
- Option Two: Enable or Disable Fullscreen Optimizations for Current User in Game Bar Settings
- Option Three: Enable or Disable Fullscreen Optimizations for Current User using a REG file
- Option Four: Enable or Disable Fullscreen Optimizations for Specific Apps for Current User in Compatibility Settings
- Option Five: Enable or Disable Fullscreen Optimizations for Specific Apps for All Users in Compatibility Settings

OPTION ONE

Enable or Disable Fullscreen Optimizations for Current User in Advanced Graphics Settings
This option is only available starting with Windows 10 build 17093. This option is no longer available starting with at least Windows 10 build 17134.
This option is the same setting as Option Two and Option Three.
1. Open
Settings, and click/tap on the
System icon.
2. Click/tap on
Display on the left side, and click/tap on the
Advanced graphics settings link on the right side. (see screenshot below)
Starting with Windows 10 build 17101, the Advanced graphics settings link will now just say Graphics Settings.
3. Check (default) or uncheck
Enable fullscreen optimizations for what you want. (see screenshot below)
Disabling this fullscreen optimization setting will be applied globally for the current account.
4. You can now close Settings if you like.

OPTION TWO

Enable or Disable Fullscreen Optimizations for Current User in Game Bar Settings
This option is no longer available starting with at least Windows 10 build 17134. This option is the same setting as Option One and Option Three.
1. Open
Settings, and click/tap on the
Gaming icon.
2. Click/tap on
Game bar on the left side, and check (default) or uncheck
Show Game bar when I play full screen games Microsoft has verified for what you want. (see screenshot below)
Disabling this fullscreen optimization setting will be applied globally for the current account.
3. You can now close Settings if you like.

OPTION THREE

Enable or Disable Fullscreen Optimizations for Current User using a REG file
This option is the same setting as Option One and Option Two.
The downloadable .reg files below will modify the DWORD in the registry key below.
HKEY_CURRENT_USER\System\GameConfigStore
GameDVR_FSEBehavior DWORD
0 = Enable
2 = Disable
1. Do
step 2 (enable) or
step 3 (disable) below for what you would like to do.
2. To Enable Fullscreen Optimizations for Current User
This is the default setting.
A) Click/tap on the Download button below to download the .reg file below, and go to
step 4 below.
Enable_fullscreen_optimizations_for_current_account.reg

3. To Disable Fullscreen Optimizations for Current User
Disabling this fullscreen optimization setting will be applied globally for the current account.
A) Click/tap on the Download button below to download the .reg file below, and go to
step 4 below.
Disable_fullscreen_optimizations_for_current_account.reg

4. Save the .reg file to your desktop.
5. Double click/tap on the downloaded .reg file to merge it.
6. When prompted, click/tap on
Run,
Yes (
UAC),
Yes, and
OK to approve the merge.
7. If you like, you can delete the downloaded .reg file if you like.

OPTION FOUR

Enable or Disable Fullscreen Optimizations for Specific Apps for Current User in Compatibility Settings
Disabling fullscreen optimizations using Option One, Option Two, Option Three, or Option Five will override the settings made using this option.
1. Right click or press and hold on the .exe file or shortcut of a
classic app (desktop) you want, and click/tap on
Properties. (see screenshot below)
2. Click/tap on the
Compatibility tab, check or uncheck (default)
Disable fullscreen optimizations for what you want, and click/tap on
OK. (see screenshot below)

OPTION FIVE

Enable or Disable Fullscreen Optimizations for Specific Apps for All Users in Compatibility Settings
Disabling fullscreen optimizations using Option One, Option Two, or Option Three will override the settings made using this option.
1. Right click or press and hold on the .exe file or shortcut of a
classic app (desktop) you want, and click/tap on
Properties. (see screenshot below)
2. Click/tap on the
Compatibility tab, and click/tap on the
Change settings for all users button. (see screenshot below)
3. Check or uncheck (default)
Disable fullscreen optimizations for what you want, and click/tap on
OK. (see screenshot below)
4. Click/tap on
OK. (see screenshot below)
That's it,
Shawn