If you have been through all the usual problems such as ensuring the iis and www services are running AND CCM appears to be working without problems (apart from the one you have raised) then I think I know what the issue is.
This is Cisco's fault on the upgrade- they clearly haven't fully tested the upgrade properly.
Firstly tell me what errors in event viewer you are seeing- go to 'system' event logs, do you see any errors with the source= 'DCOM' or 'W3SVC'? If so proceed...
What you will need to do is from your call manager go to 'start'- 'administrative tools' - 'computer management'. Under 'system tools' - 'users' you should see two accounts- IWAM... and IUSR... Make a note of these accounts.
Now go to start-admin tools-component services-computers-my computer-COM+ Applications-IIS CCMAdmin.
Right click in the left hand panel the line with ...IIS CCMadmin.... Go to properties and click the identity tab. Verify that the username being used matches the one you have a made a note of in the first step. e.g. IWAM_Guest.
I suspect that they are different, if so change back to IWAM_Guest from IWAM_Spirian in Component Services- restart IIS and WWW services and let me know.
You will need to do this for all the web sites including CCMUSER- but first try with CCMADMIN and see if it works.
