32-bit Office Add-in fails to register on Win 7 64-bit with Office 2010 64-bit
Posted on 2011-03-03
We have an Office add-in that was written way back in t' year DOT in Visual Basic 6. It has always served us well. We even get it to run on a Windows 7 64-bit machine with a 32 bit version of MS Office on it....
But on Office 2010 64-bit it all goes horribly wrong.
When I run the MSI, I get an error when the MSI tries to register our DLL. The error is 1904, with a returned value of (hex) 80004005
Same happens if I ignore the error and, afterwards, try to run regsvr32 on the DLL, again Hex 80004005
The machine is Windows Home Premium, and the user is a local administrator. I switched off UAC completely, to no avail.