Will update after I get advice from the shop.

Yes PC is around 10 years old and I have been fortunate it has lasted so long. Drivers are up to date.

I only need a basic PC as I only use it to surf the web.

I do not play games or watch videos etc on it.

Will most likely just buy a new basic PC for around 15k if the issue cannot be fixed cheaply.

Thank you to everyone for your help.