Default website not starting because of 80 clash

I have three was sites on a domain controller:
1 - Default Website - CertControl, Enrol etc
2 - WSUS Administration
3 - Microsoft SharePoint Administration
4 - Online (Custom website)

Having an issue with my default website not starting with the following error:
Event Type:      Error
Event Source:      W3SVC
Event Category:      None
Event ID:      1007
Date:            14/04/2006
Time:            8:45:52 p.m.
User:            N/A
Computer:      SVR-01
Cannot register the URL prefix 'http://*:80/' for site '1218092310'. The necessary network binding may already be in use. The site has been deactivated.  The data field contains the error number.

For more information, see Help and Support Center at
0000: b7 00 07 80               ·..€    

It is not being cause by the sharepoint site (different ports) or my online site (on port 80 with host headers). It is being caused by the WSUS Administration site being on port 80. If I stop this site i can start the default site. I dont recall changing any setting it has just started clashing.
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Hi again.

This is better info to help you with.

The problem is WSUS.  When it is installed, you have the option of using a different website and port for it.  

If you have another server, you may want to install IIS and WSUS on that server and get it off this one.  You have a lot running on IIS now.

If I'm not mistaken, you can install WSUS on a workstation running the personal webserver.


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GlennCameronAuthor Commented:
I inherit this network from a previous employee therefore I am unsure what port it was initialy installed under. The thing that is weird is that is has been configured and running for 6 month now without issue.
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Windows Server 2003

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