Exchange Server 2010 rollup upadate error 1603 or 1635

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When you are trying to install update rollup or service pack for Microsoft Exchange Server 2010 or 2007 and you receive error 1603 or 1635 you can resolve this problem like below.

Problems occurs because new rollup update or service pack check %SystemDrive%\Windows\Installer folder for .msp files from earlier update rollups.

If an .msp file is missing then process fails with code 1603 or 1635.


To resolve this problem you need to follow these steps:

  1. Make sure that all antivirus, anti-spam, and monitoring services are disabled.
  2. Clear the data in the “%SystemDrive%\Windows\TEMP”folder.
  3. Try to install the update rollup or service pack.
  4. If the installation fails, open the Exchangesetup.msilog installation log in the “%SystemDrive%\ExchangeSetupLogs” folder.


If you can’t find ExchangeSetup.msilog file then you have to use /lxv switch during installation rollup or service pack like below:

Exchange2007-KB968012-x64-EN.msp /lxv c:\Rollup.log


Now you can open log file and it looks like this below:

MSI (s) (80:B8) [22:57:41:526]: Opening existing patch 'C:\WINDOWS\Installer\9dd4195.msp'.
MSI (s) (80:B8) [22:57:41:526]: Opening existing patch 'C:\WINDOWS\Installer\33502bc.msp'.
MSI (s) (80:B8) [22:57:41:526]: Note: 1: 2203 2: C:\WINDOWS\Installer\33502bc.msp 3: -2147287038 
MSI (s) (80:B8) [22:57:41:526]: Couldn't find local patch 'C:\WINDOWS\Installer\33502bc.msp'. Looking for it at its source. MSI (s) (80:B8) [22:57:41:526]: Resolving Patch source.
MSI (s) (80:B8) [22:57:41:526]: User policy value 'SearchOrder' is 'nmu'
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Media enabled only if package is safe.
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Looking for sourcelist for 
product {FAD5369A-D8A9-4783-97E1-3DDB12DCBBAC}
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Adding {FAD5369A-D8A9-4783-97E1-3DDB12DCBBAC}; 
to potential sourcelist list (pcode;disk;relpath).
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Now checking product {FAD5369A-D8A9-4783-97E1-3DDB12DCBBAC}
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Media is enabled for product.
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Attempting to use LastUsedSource from source list.
MSI (s) (80:B8) [22:57:41:526]: SOURCEMGMT: Processing net source list.
MSI (s) (80:B8) [22:57:41:526]: Note: 1: 1402 2: UNKNOWN\Net 3: 2 
MSI (s)(80:B8) [22:57:41:526]: Note: 1: 1706 2: -2147483647 3: Exchange2007-KB949870-x64-EN.MSP Snippet: Exchangesetup.msilog file or Exchangesetuplog.txt log file


We can see from log file that 33502bc.msp file in the C:\Windows\Installer was not found.

Also we can find information that this file is related to Exchange2007-KB949870-x64-EN.MSP

To resolve this issue we have to follow these steps:

  • Download update 949870 from the Microsoft Download Center.
  • Copy the update file that you downloaded to the “C:\windows\installer” folder.
  • Rename the update file as “33502bc.msp.”
  • Run the installation process again.


Now we can run installation again, the installation process should finish with success.

If the installation process fails then you must repeat step 4 for each missing file in Exchangesetup.msilog

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