My pc randomly freezes, but it's not sudden. The freeze is kinda building up until it is completely frozen. Firstly my internet connection drops then after like 4 seconds I can't click on anything, then everything freezes, but if I watch a youtube video and my pc starts freezing I can still hear the audio of it playing for like a minute until it also freezes. I have to hard reset it to get it working again. Any suggestions as to what to check or do in this situation?