PC Doctor have sorted it out.  It involved them sending me a file (which related to the specific version of Dell Support aka PC Doctor that I had, so it might be different for everyone).  Sorry I am unable to upload the file they sent as the format is not allowed.  In any case, it is probably a different file for everyone, as I say depending on the version installed.  You'd need to submit a support request, and include in it the version of PC Doctor that is installed. QUOTE// According to your registry it does appear Dell Support Center 5803.11 is actually installed.  Attached to this e-mail is the appropriate missing installer file name '5803.11.msi.rename' inside PRB06241_attachment_5803.11.zip.The procedure to restore this file is the same as previously outlined.  The same instructions are listed below just in case.1) Click the Windows icon in the lower, left-hand corner of the screen2) Type "Folder Options" into the text box and press the "Enter" key3) Click on the "View" tab4) Scroll down to the "Hidden files and folders" section5) Ensure that "Show hidden files, folders, and drives" is selected6) Click "OK"7) Copy the attachment '5803_11.msi.rename' to 'C:\Windows\Installer'Locate the appropriate name for missing installer file:These steps are necessary to identify the name of the missing installer file specific to your system.8) From the Start Menu run 'cmd.exe'9) reg export HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\C78A0900E0E34D34AA177AB16065A3A4 output_dsc.txt10) Open output_dsc.txt with a text editor like notepad.exe11) Scan to the line that says "LocalPackage="C:\\Windows\\Installer\\.msi" (NOTE: .msi will be a filename specific/custom to your system's registry)12) Keep this file open as you will need this information for step 13)Rename the .msi installer executable to match what is found in the registry specific to your system:13) Rename C:\Windows\Installer\5830_17.msi.rename to match the value you found in item 11) for .msiFor example: Rename '5803.11.msi.rename to' '1dbc439a.msi'Continue with uninstall from the command line:14) msiexec /l*vx install_0090A.log /i {0090A87C-3E0E-43D4-AA71-A71B06563A4A}NOTE: This should give you a Windows Installer pop-up with contents 'Are you sure you want to uninstall this product?'15) Select 'Yes' to begin uninstall of Dell Support Center 3.15.5803.11.These commands should uninstall Dell Support Center 3.15.5803.11.  You can then rerun aulauncher.exe which should upgrade you to the latest version of Dell Support Center.
My Dell is a amonth old.  It is a Dell XPS17 702x, bought direct.  Support Centre Installed: 3.15.5830.17 Latest available: 3.15.5907.12 I am heartily sick of hte support centre.  Once a day or more, an update is downloaded in the background, then suddenly it pops up instalilng the upgrade.  That always fails because an earlier version is installed.  Easy, one would think, uninstall it.  BUT I CANNOT>  It wants me to load my Support CD where there is supposedly a file called PCDoctor_bundle_dell_dsc_x64.msi.  There is no support CD.  I only got one DVD with my Dell, labelled Drivers and Utilities.  It does not have that file on it. I have looked on the support forum here, and elsewhere using Google.  I have tried everything I can find: I cannot find that msi file.  It is not on the PC.  I did not get a CD that it is said to be on.  SO, what do I do now?  I cannot live forever with this popping up every day.and failing.
Sick of Dell Support Centre. Won't upgrade, won't uninstall.