Due to SCCM version incompatibility management client trying to repair pc,So it creates unwanted junk folders with long names "sandbox", kindly follow the below setups to uninstall SCCM manually.
1.Run C:\windows\ccmsetup\ccmsetup.exe /uninstall from and elevated cmd prompt.
2.Delete directory "c:\windows\ccmsetup" .
3.Delete all the folders with long names "sandbox" that have been generated.
4.Check to see if the folders come back, if so check to see is back.if so talk to your system team.
