IIS Worker issues with WSUS 3

On the two boxes that I’ve upgraded to WSUS version 3 this week I have received errors with the IIS Worker process crashing. One of the boxes has DEP intervening with the process and the other box just comes up with a message asking me to send the data to Microsoft.
Eventvwr shows event 1009, Source W3SVC with the error message being “A process serving application pool ‘WsusPool’ terminated unexpectedly. The process id was ‘4652’. The process exit code was ‘0xc0000005’.”
The DEP error states “To help protect your computer, Windows has closed this program”,


Name: IIS Worker Process. Clicking on Change Settings gives me the DEP Screen,


which shows the IIS Worker process already allowed. Clicking close then offers to send a report to Microsoft (again). Oddly enough, the mmc console seems to work ok when launched so at the moment I’m not sure what is causing it. Seems too much of a coincidence for it NOT to be wsus3 though.
Not had too much time to look at the main cause for this – it could be due to the fact that the pc’s haven’t been rebooted since the install (and may need .net patches installed)