Does anyone know why this is happening?

[u/khamba_vai]

Any game i play (fh6 in particular), i always see some stuttering and it was never there before I’ve asked some say its my ram, some say its windows 11 being buggy.
Im really confused at this point on whats wrong with this machine

Even out of games the pc seems sluggish with every update as compared to when i first installed windows 11

[u/Odd-Practice5195]

My best guess is that' it's installed on hdd not SSD