Windows Service won't run as a 32 bit process

Question

I have a Windows Service, written in C# (.Net Framework 4.8) and installed using an installer built with WixSharp. The service needs to run as 32bit (because it references a COM component which needs to run in 32 bit).

I have tried the following:

All projects in the solution (the service itself, any helper libraries, and the installer project) have only one configuration, which is 32 bit (x86).
corflags tells me that the service executable requires 32 bit; I also set that explicitly once more. I.e. I run

corflags.exe /32bitreq+ <myservice.exe>

as well as

corflags.exe <myservice.exe>

which gives me:

Version   : v4.0.30319
CLR Header: 2.5
PE        : PE32
CorFlags  : 0x3
ILONLY    : 1
32BITREQ  : 1
32BITPREF : 0
Signed    : 0

But still, when I start the service, it runs as a 64bit process on a 64bit Windows 10 laptop.

Note that all similar questions, e.g. Forcing a .Net Windows service to run as 32-bit on a 64-bit machine and Launching MSIL exe as a 32-bit process on 64-bit Windows , all state you only need to run corflags.exe, but this obviously does not work.

Any idea?

Windows Service won't run as a 32 bit process

0 Answers0