Cannot connect to the internet

After booting up my computer has suddenly stopped being able to connect to the internet.

I am connected to the router fine with full signal on wifi.

I have restarted my computer and the router.

I have connected to the same router and the internet succesfully, with other devices.

I restarted the machine but instead of logging into my account i logged into the guest account i have set up.

When doing this i could connect to the internet no problem.

I rebooted again this time logging into my account and the problem was still there. I was Connected to the router fine but unable to connect to the internet.

I then logged out (not restarted my computer) and logged in as a guest again. This time i couldn't connect to the internet on the guest account either.

I then rebooted the machine again, logged in as a guest and was able to connect to the internet just fine.

So i guess there is a process running or something happening asscoiated with my account, which is blocking my acess to the internet.

PLEASE HELP! It's driving me mad 🙂