0x80248011
SUS_E_DS_UNABLETOSTART
Can occur due to problems in the Internet cache or corruption in the Datastore folder
Clear the Internet Explorer cache
Start Internet Explorer.
On the Tools menu, click Internet Options.
Click the General tab.
In the Temporary Internet files section, click Delete Cookies.
Click OK in the Delete Cookies box.
In the Temporary Internet Files section, click Delete Files.
Select the Delete all offline content check box in the Delete Files dialog box.
Click OK.
In the History section, click the Clear History button.
Click Yes.
Click OK.
Try windows update again
If that hasn't done the trick, then you may need to delete the contents of the DataStore folder
Stop the Automatic Updates service
Click Start, Choose Run.
In the Run box, type services.msc.
Click OK.
Right-click the Automatic Updates service.
Click Stop.
Stopping the service will take a moment.
Delete the contents of the DataStore folder
Click Start. Choose Run.
In the Run box, type %windir%\SoftwareDistribution
Click OK.
Open the DataStore folder.
Delete all contents of the DataStore folder.
Close the window.
Start the Automatic Updates service
Click Start. Choose Run.
In the Run box, type services.msc.
Click OK.
Right-click the Automatic Updates service.
Click Start.
Starting the service will take a moment.
Further information:
When searching for available updates on the Update site, you receive the 0x80248011 error.
http://update.microsoft.com/windowsupdate/v6/showarticle.aspx?articleid=21&ln=en&IsMu=False
You may receive an error message when you search for available updates on the Windows Update Web site
http://support.microsoft.com/kb/883821