Let try to run a system scan with Speed Up My PC to see any error, then you can do some other troubleshooting steps. If you encounter difficulties with bel sekolah.exe, you can uninstall the associated program (Start > Control Panel > Add/Remove programs
Let try the program named DriverIdentifier to see if it helps. Is bel sekolah.exe using too much CPU or memory ? It's probably your file has been infected with a virus.
