We'll need more information.
Please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Have you tried replacing the CMOS battery with a fresh cell? Also, did you change any settings within BIOS prior, like an overclock? You should be able to see an option to set defaults, save & exit and see if that helps your cause.