You need to enter password where? when the computer boots up? is it the Bios password? or the Windows password after the OS loads up?
If its the BIOS password you dont remember....you need to open the case...and look for the password reset jumpers...there are many articles written on this subject!
Mike
HP Pavilion 590-p0026nq, Core i7-8700, 8GB, 1TB, NVIDIA GeForce GTX 1060+Samsung 970 Evo Plus 256 GB NVMe