sk1f23 wrote: Recently I started getting errors about signing the .msi package when building installation. Before anyone suggests invalid certificate or credentials - we use the same certificate and credentials for all other installations projects and they all build correctly. The only project that fails is "mothership" installation that contains few sub-installations and a launcher (which are all successfully build with the same signing certificate). If I disable the packaging of the installation into a single setup.exe file, the .msi appears to be correctly signed. The installation build succeeds if I disable signing of the .msi package and only sign setup.exe Here is how the end of the build log looks like: ---------------------------------------------- Media table successfully built Started signing certificate.msi ... Successfully signed: certificate.msi Performing Upgrading and Patching Validation Started signing MyProduct.msi ... Successfully signed: MyProduct.msi ISDEV : error -6258: An error occurred extracting digital signature information from file "C:\...\DiskImages\DISK1\MyProduct.msi". Make sure the digital signature information provided in the IDE is correct. ISDEV : error -6003: An error occurred streaming 'C:\...\DiskImages\DISK1\MyProduct.isc' into setup.exe ---------------------------------------------- My only idea is that I added .NET 4.0 prerequisite to few sub-installations, which resulted in bigger installation package footprint and this somehow resulted in this error. Any suggestions will be highly appreciated. I also have this issue after windows update. My Windows version is Server 2008 R2 X64, IS 2010. I use windbg to debug, found IS crash at wintrust.dll!WinVerifyTrust , then I search all the x86 version of wintrust.dll , and replace back the V6.1.7601.21933 to sysWow64, and the issue is ok. ... View more