1st option: go to bios setup and go to exit option and hit load setup default then press "f10" to save then enter, or exit and save current settings.
if u dont know how to enter bios setup restart your computer then at start up press "f2" or "delete" if not try to research how to setup bios with your motherboard
2nd option: if you notice that your system time is not working or "just like wall clock that has no battery" or something, then try to replace cmos battery in your motherboard and setup your time setings in bios setup. "cmos battery maintain setings on your computer system such as time, bios setup,etc"
3rd option: reinstall your hardware and software then clean all your computer parts with proper handling
hope thats help.....
sory about my english ^_^