[Relief]

Yes, I believe you should definitely try to repair, and then upgrade. I think the freezing comes either from software (your operating system running) or hardware (could be dust, liquid damage etc.).

When you say 100% disk usage, you mean it's at 100% usage even in idle or do you mean that it is at full capacity ? If it's 100% while idle, what is your current operating system and build ? Could you show us your task manager and processes running while it's at 100% ?

It could just be a system issue, so I would definitely recommend to try and fix that issue or, because you say you have tried everything, to format your system (after backing up the data in your drive somewhere else).

 

[Relief]

it is 100% when idle thanks for asking this.

I know that for early Windows 10 builds (pre-1809), I encountered this issue and did this :

1. Launch the Settings app.
2. Click the "System" category.
3. Click the "Notifications & actions" page.
4. Clear the "Get tips, tricks and suggestions as you use Windows" checkbox.

It is very likely that this is NOT related to your issue. But just a heads-up. We need your task manager with the processus running to check if 100% is due to something or not. For instance, I had 2Mo/s total of usage and it said 100% disk usage and clearing the tricks checkbox solved the issue at the time (4-5 years ago).