I have old computer.
I threw out PS2 keyboard and mouse.
And then I bought USB keyboard and mouse.
No need to tell, that I did not know about USB legacy and that I did not know, that adapters do not work on new keyboards and mouses.
Now, after more than month, I finally found PS2 keyboard and mouse in one shop and bought again PS2 equipment.
Now I have question, if my computer is more than 7 years old and I will enable USB Legacy- will my PS2 keyboard and mouse work and can my PC have some other problems with enabling USB Legacy?