I know this question is asked but there is no solution for me. I tried unlocker, fileassassin, lockhunter and commnd prompt to delete file but it didn't work.
Boot your system with a Linux live CD then you should be able to delete it.
If you don't have a CD burner you can try using a flash drive with YUMI.
Or you can reboot the system to force delete a file, here are the steps:
Step1: Press Win logo key + R and then type: MSConfig.
Step2: Now, turn to Boot tab and then tick Safe Boot from Boot Options section.
Step3: Once you click on the OK button, the system will ask you to restart the system.
After successfully booting into Safe Mode, launch File Explorer and try to delete unwanted files.