Issue 4: SignTool stopped working

After a recent reinstall of my developer machine I received errors when compiling projects that use SignTool in the Post-build event to sign the built assembly with an authenticode certificate.

This is because the CAPICOM SDK is deprecated and won’t work out of the box with x64 versions of Windows. Also there is probably a better way to sign your assemblies (which I should research some time) these days, but since we have quite some build machines and legacy projects using this method it seemed best to get things working again.

I found the answer here:

http://www.peppercrew.nl/index.php/2011/02/windows-7-x64-signtool-error-signtool-requires-capicom-version-2-1-0-1-or-higher/

In short:
– Download the CAPICOM SDK from Microsoft
– Install it.
– Copy the capicom.dll to your SysWOW32 folder.
– Register it using the regsvr32.exe in that same folder.