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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
This article describes the error messages that you may receive when you try to install the Microsoft Flight Simulator 2004 Update v9.1 update for Microsoft Flight Simulator 2004 - A Century of Flight. This article also lists the possible causes and resolutions for each error message.
Update Error Type: 25
You may receive the "Update Error Type: 25" error message if the Fs91upd.exe update file is corrupted, or if the Fs91upd.exe update file does not download. To resolve this error message, follow these steps:
Delete the downloaded update file.
Delete the temporary Internet files. To do this in Microsoft Internet Explorer, follow these steps:
Start Internet Explorer.
On the Tools menu, click Internet Options.
On the General tab under Temporary Internet files, click Delete Files.
Click OK to confirm the deletion of the temporary Internet files.
Click OK to close the Internet Options dialog box.
Download the Flight Simulator 2004 Update v9.1 (Fs91upd.exe) update. To do this, visit the following Microsoft Web site:
After you have finished downloading the update file, you must verify the file size of the update file. To do this, right-click the Fs91upd.exe file, and then click Properties. The correct file size of the update file is listed in the following table. The correct file size depends on the language of the update.
26.7 megabytes (MB) or 28,083,392 bytes
26.7 megabytes (MB) or 28,087,528 bytes
26.7 megabytes (MB) or 28,080,232 bytes
26.7 megabytes (MB) or 28,081,408 bytes
26.7 megabytes (MB) or 28,081,920 bytes
27.2 megabytes (MB) or 28,536,624 bytes
Use one of the following methods:
If the update file is the correct file size as listed in the table in step 4, double-click the Fs91upd.exe file to install the update.
If the update file is not the correct file size as listed in the table in step 4, delete the downloaded update file, and then download the update that is listed in step 3 again.
Update Error Type: 34
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
You may receive the "Update Error Type: 34" error message if there is a registry value that is not valid for the location of the Fs9.exe file. To resolve this error message, correct the EXE Path string value in the registry. To do this, follow these steps:
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate and then select the following registry key: