IIS7 Default Web Site "Require 128-bit SSL" turned on, and dimmed

SBS 2008 server. WSUS is logging this Event:

Log Name:      Application
Source:        Windows Server Update Services
Date:          9/5/2013 3:18:30 PM
Event ID:      13042
Task Category: 6
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      server.domain.local
Description:
Self-update is not working.

Research shows that a common cause is having Require SSL or Require 128-bit SSL enabled on Default Web Site, and that is the case here, so I know that's at least part of the problem.

There is no cert bound to 443 on Default Web Site, which is correct. This is duly reported by the GUI, which says, "The site does not have a secure binding (HTTPS) and cannot accept SSL connections."

However, the "Require SSL" and "Require 128-bit SSL" checkboxes are both dimmed, so I can't turn it off.

How do I get past this?
JRVSAsked:
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becraigCommented:
Try the below:
appcmd set config "Default Web Site" /section:access /sslFlags:None /commit:APPHOST
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JRVSAuthor Commented:
Perfect...thanks becraig!

For lurkers, this did solve the WSUS problem.

And for lurkers who don't know where APPCMD.EXE lives, it's in %SYSTEMROOT%\System32\InetSrv.
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