Hallo,

 when installing KB951213 over WSUS or over the silverlight-website I got an Installation error. The problem seems to be that the temp folder is not so good chosen because it is on a drive witch is a substitude (subst), but the MSI-Installer is not able to find this as service-process.

I opened the real directory and ran the install.exe from Installer the Update was OK.

I think the Setup.exe should only use physical drives! 

Here is the installation log file:

=== Verbose logging started: 21.05.2008  10:17:08  Build type: SHIP UNICODE 3.01.4001.5512  Calling process: f:\temp\ext18866\install.exe ===
MSI (c) (A8:68) [10:17:08:529]: Resetting cached policy values
MSI (c) (A8:68) [10:17:08:529]: Machine policy value 'Debug' is 0
MSI (c) (A8:68) [10:17:08:529]: ******* RunEngine:
           ******* Product: {89F4137D-6C26-4A84-BDB8-2E5A4BB71E00}
           ******* Action:
           ******* CommandLine: **********
MSI (c) (A8:68) [10:17:08:529]: Client-side and UI is none or basic: Running entire install on the server.
MSI (c) (A8:68) [10:17:08:529]: Grabbed execution mutex.
MSI (c) (A8:68) [10:17:08:545]: Cloaking enabled.
MSI (c) (A8:68) [10:17:08:545]: Attempting to enable all disabled priveleges before calling Install on Server
MSI (c) (A8:68) [10:17:08:545]: Incrementing counter to disable shutdown. Counter after increment: 0
MSI (s) (6C:74) [10:17:08:545]: Grabbed execution mutex.
MSI (s) (6C:60) [10:17:08:545]: Resetting cached policy values
MSI (s) (6C:60) [10:17:08:545]: Machine policy value 'Debug' is 0
MSI (s) (6C:60) [10:17:08:545]: ******* RunEngine:
           ******* Product: {89F4137D-6C26-4A84-BDB8-2E5A4BB71E00}
           ******* Action:
           ******* CommandLine: **********
MSI (s) (6C:60) [10:17:08:545]: Machine policy value 'DisableUserInstalls' is 0
MSI (s) (6C:60) [10:17:08:592]: End dialog not enabled
MSI (s) (6C:60) [10:17:08:592]: Original package ==> C:\WINDOWS\Installer\b7ced4e.msi
MSI (s) (6C:60) [10:17:08:592]: Package we're running from ==> C:\WINDOWS\Installer\b7ced4e.msi
MSI (s) (6C:60) [10:17:08:607]: APPCOMPAT: looking for appcompat database entry with ProductCode '{89F4137D-6C26-4A84-BDB8-2E5A4BB71E00}'.
MSI (s) (6C:60) [10:17:08:607]: APPCOMPAT: no matching ProductCode found in database.
MSI (s) (6C:60) [10:17:08:607]: MSCOREE not loaded loading copy from system32
MSI (s) (6C:60) [10:17:08:623]: Note: 1: 2262 2: File 3: -2147287038
MSI (s) (6C:60) [10:17:08:623]: Note: 1: 2205 2:  3: MsiFileHash
MSI (s) (6C:60) [10:17:08:623]: Opening existing patch 'C:\WINDOWS\Installer\b7ced5c.msp'.
MSI (s) (6C:60) [10:17:08:654]: Unable to create a temp copy of patch 'f:\temp\ext18866\Silverlight.msp'.
MSI (s) (6C:60) [10:17:08:654]: Note: 1: 1708
MSI (s) (6C:60) [10:17:08:654]: Note: 1: 2729
MSI (s) (6C:60) [10:17:08:686]: Note: 1: 2729
MSI (s) (6C:60) [10:17:08:686]: Product: Microsoft Silverlight -- Installation failed.

MSI (s) (6C:60) [10:17:08:686]: MainEngineThread is returning 1635
Das Patchpaket konnte nicht geöffnet werden. Stellen Sie sicher, dass das Patchpaket vorhanden ist und dass Sie darauf zugreifen können, oder wenden Sie sich an den Hersteller, um sicherzustellen, dass es sich um ein gültiges Patchpaket für den Windows-Installationsdienst handelt.
C:\WINDOWS\Installer\b7ced4e.msi
MSI (c) (A8:68) [10:17:08:686]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: -1
MSI (c) (A8:68) [10:17:08:686]: MainEngineThread is returning 1635
=== Verbose logging stopped: 21.05.2008  10:17:08 ===

Thanks

Dieter Pelz 

Hello:

  Thanks for your reporting. It's a known issue and being worked on.

Regards

Sincerely,
Allen Chen
Microsoft Online Community Support

Please remember to mark the replies as answers if they help and unmark them if they provide no help.

I have been trying to install the latest version of silverlight.  It keeps giving me error code 1635, I have tried to uninstall but when i do that it tells me it cant find it.  I deleted everything manually and tried reinstalling but get the same error.  Anyone have any suggestions on what I can do to get this installed?

I am still having the same issue when trying to install silverlight.  I even keep getting the windows automatic update to install silverlight but it never installs and I keep getting this error.

Error 1635 

You reached this page since you encountered problems with the installation of Microsoft Silverlight. In many cases these problems are due to incompatible browser and operating system or due to an old pre-release version of Silverlight. Please follow the Uninstall Instructions to remove any previous versions from your system and then visit the Silverlight Web site and install the latest version.

Anyone have suggestions or step by step instructions on how to reolve this issue?