Signed files with SHA-2 (SHA-256) signature hashing algorithm on Windows 7 failed to run and produces an error warning.
"Error: "Windows cannot verify the digital signature for this file."
A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source
Only Windows 8 supports signatures signed with the SHA-256 hashing algorithm out of the box. By default, Windows 7 only works with SHA-1 signed hashing algorithm.
Windows 7 users looking for a workaround have two options;
For more information on Dual signing, please view the Microsoft article - Signing a Driver for Public Release under the section "Signing a driver package with two signatures".