Home → Troubleshooting → All Products: Other Issues → "Some files can contain viruses. ..." When Opening Example Spreadsheets
Applies to: All products, 5.x–7.x, in Office 2016
In Help » Example Spreadsheets, no matter which file I select, I get this message:
Opening C:\Program Files (x86)\Palisade\ ...
Some files can contain viruses or otherwise be harmful to your computer.
It is important to be certain that this file is from a trustworthy source.
Would you like to open this file?
This error in Excel is due to Microsoft's update KB 4011051, which was rolled out beginning 2017-08-01.
Microsoft fixed the problem with a later update, KB 4011093, rolled out beginning 2017-08-22. Either uninstall 4011051, install 4011093 manually, or wait for the fix to reach you through Windows Update.
See also: Hyperlinks to another Excel workbook no longer work after updating to the August 1, 2017 update
Last edited: 2017-08-31