The obvious answer is it’s shagged out….. and that I don’t know jack about them…. but I’re some one has the knowledge

What browser.?

Internet explorer…no idea what version

Try google chrome.

could be the BIOS battery has gone flat and you’ve lost your date settings, meaning all your cookies are getting expired

where’s the BIOS battery live? PC’s easily 5 years old

You’ve/someone else has looked at porn…. 😳
then tried to cover yours/their tracks and deleted browsing history and all the rest by mistake….

Some how however hard i try i get busted every time 🙄

it’s mounted on the motherboard, looks like a watch battery type of thing

there’s usually a message on start-up if its dead but it can be easy to miss, easiest way to check it is to look at the clock/calendar and see if they are on the correct date, if they are then your problem lies elsewhere.