Ran into this problem today and thought I would share my solution for anyone else having it.
After some updates loaded from Microsoft, our internal website companyweb stopped working. We do not use it for much. The only real thing is for faxes. All incoming faxes are received by the server and stored in companyweb for staff to view and/or print.
After some searching, I came across this page.
This worked for me. Here is what I did…
Opened an elevated command prompt (right click on CMD and choose Run As Administrator)
In the CMD box, I typed ‘cd C:\Program Files\Common Files\Microsoft Shared\Web server extensions\12\BIN\’
Then I typed ‘psconfig -cmd upgrade -inplace b2b –force’
It ran the SharePoint Products and Technologies Configuration Wizard. When it completed, I had to manually go to services and start the World Wide Web Publishing Service. After that, SharePoint and Companyweb ran fine.