Delete “Install macOS High Sierra” from Trash

Hello,

So I am trying to delete “Install macOS High Sierra” file from trash, but whenever I try to delete I get the following error "The operation can’t be completed because the item “Install macOS High Sierra” is in use."

Tried running various commands through terminal.

Any help would be appreciated because it is eating 5 GB.

System Integrity Protection in Mac OS X

csrutil status in system report software tab

Command+R press the power button

Utility ->terminal type

csrutil disable

reboot login now delete your trash files which you were not able to delete before disabling SIP

since SIP is disabled you can delete it .

again command +R press power button open utility -open terminal and type

csrutil enable

its done

reboot

login

open disk utility run first aid for all containers including sub-containers