Problem Updating From 2.9.2 On WAMP

Hi, I try to auto update from the admin backend from 2.9.2 to 3.0.1. It runs through and tells me it has been succesful, but as soon as i click on another page it just shows a white screen. The same happens when I try and reload the frontend homepage, I simply get a white screen.

All help or comments etc. appreciated.

Thanks,
Cian