The first language is automatically selected from the list of installed language packs found in Windows settings:Time & language > Language & region > Language. The list can be reordered using drag and drop and if your language is not supported, English is the fallback one.
Windows reports the battery status to the app and it might be the cause that your battery health is poor or discharging even if plugged in. The WEI benchmark can’t be run while the battery is reported as discharging.
This option is automatically disabled if your GPU does not support it.
This is how WMI (the tool used by the app to get these kind of information) reports the RAM capacity. Something on your OS is corrupted, might actually be the WMI repository itself. You can try to rebuild it or reinstall your OS as a last, unpleasant solution.
The setting found under Performance > Visual > Adjust visual effects for best performance will make fonts look more pixelated as a side effect. This effect is caused by Smooth edges of screen fonts option, which for best performance needs to be turned off.
The app requires administrator rights, so the user opening the app must be an administrator as well, otherwise, despite you being logged in with another user, the app will still open with the administrator user, all settings being applied to that one.
To make a user an administrator you can use net localgroup command or lusrmgr.msc tool.
This means you have a volume license, which is not stored locally on your device, but managed by the organization that owns it.
This message appears when certain Windows settings configured in Group Policies are changed (either by your organization or by third party apps). You can find a tutorial to get rid of it here, but settings affected by this message will reset to their default.