ive deleted it before and honestly i forgot i switched my win 11 icons with the 10 because i have been using them for so long and i accidentally updated windows and now i cant delete the mun file it says you require permission from TrustedInstaller.exe i already am the owner of trusted installer...
delete icon cache first then run del C:\Windows\SystemResources\imageres.dll.mun and then download the mun from How to use Windows 10 Icons in Windows 11 this and then open system resources and paste the new mun in and then restart pc