“Unexpected error from external database driver” error when you create or open Microsoft Excel .xls files

Summary

This security update resolves an issue that was introduced in the October 10, 2017, update. Because of this issue, applications that are based on the Microsoft JET Database Engine (Microsoft Access 2007 and earlier versions, or non-Microsoft applications) fail when you create or open Microsoft Excel .xls files. When the problem occurs, you receive the following error message:

Unexpected error from external database driver (1). (Microsoft JET Database Engine)

To learn more about the vulnerability that is resolved by the October 10 update, go to CVE-2017-8718.

How to obtain and install the update

Microsoft Update Catalog

To get the stand-alone package for this update, go to the Microsoft Update Catalog website.

More Information

File information
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
** Windows Server 2008 file information**

**Note:**The MANIFEST files (.manifest) and MUM files (.mum) that are installed are not listed.

How to obtain help and support for this security update

Help for installing updates: Windows Update: FAQ

Security solutions for IT professionals: TechNet Security Support and Troubleshooting

Help for protecting your Windows-based computer from viruses and malware: Microsoft Secure

Local support according to your country: International Support

File Information

File hash information

File name	SHA1 hash	SHA256 hash
Windows6.0-KB4050795-x86.msu	C30EB7FD37EB66469EA6CF43DB92F5146EE9A8BA	6F37FA0897C3FDBD79341CDDD489FE26AA69426A37E94CEBF67747B5E2B9D7A7
Windows6.0-KB4050795-ia64.msu	3A41E29A0781DF5B37B41C0A7A9AAA76F5C1A018	58753B387587C346BDBA8453A9A37FE9F9EADF676E67273AFE252079B953841C
Windows6.0-KB4050795-x64.msu	22EF2C398A9A94E2508FD41DE7F9EF7AAC00B83C	4373E9F0B914A69E82B0CBFEA1311B72EF4968436A939C4F0A3DFFA2441F5768

For all supported x86-based versions

File name	File version	File size	Date	Time	Platform
Msexcl40.dll	4.0.9801.2	339,968	15-Oct-2017	13:31	x86

For all supported ia64-based versions

File name	File version	File size	Date	Time	Platform
Msexcl40.dll	4.0.9801.2	339,968	15-Oct-2017	13:31	x86

For all supported x64-based versions

File name	File version	File size	Date	Time	Platform
Msexcl40.dll	4.0.9801.2	339,968	15-Oct-2017	13:31	x86