Hello,
My Name is Chander, a Microsoft Independent Advisor and a fellow Windows 10 user like you. I hope I can help you on your concern.
You may use PSEXEC tool to run command prompt as system account and then delete the files\folders.
Download from here - https://docs.microsoft.com/en-us/sysinternals/d...
Extract the download in a folder, go to elevated cmd, change directory to the folder where you extracted the files. then run following
PsExec64.exe -s cmd
Press agree, now you are running cmd with system account. you can verify by running whoami command. the output should be nt authority\system
Then change directory to the direcotry where you want to delete files\folder and use del or rd command to delete files and folder.
Note - do not delete any system files, it may affect your computer.
Let me know if you have any questions or concerns.