So latest is. I restored to an earlier period, removed Norton and any traces of earlier virus checkers. So now I can access Windows Update and System Restore.
However, I am still getting the problem where Windows doesn't shut down properly. It gets to the 'Shutting Down' screen and remains there indefinitely. I have to hard crash the system to get it to restart.
Not only that, but if I try and create a restore point I get the following message.
"A Shadow Copy could not be created for the following reason:The creation of a shadow copy has timed out.Try again this operation.(0x81000101)"
Overall, its a bit strange, as sometimes it does seem to restart ok (usually directly after a System Restore), but then reverts to stalling at shutdown.
Lastly, not sure if this is important, but I've noticed when it's in the state where it doesnt shut down properly, I have missing icons in the lower right hand corner task bar. Normally I can see my volume control and wireless meter. When it is in this state these are missing.
I should also say I followed the steps above about the verifier.exe for drivers and haven't seen any issues come up. The minidump folder is still empty. I dont actually get a BSOD as the screen just stalls on 'Shutting Down'
You've all been brilliant so far, hope you can help in this last step!