JSI Tip 0401 - What files are different between the 40-bit and 128-bit versions of a Service Pack?

There are 4 files that are different in the two versions:

Ndiswan.sys
Security.dll
Ntlmssps.dll
Schannel.dll.

Rsaenh.dll is added.

See tip 376 to determine which version is installed on your system.