Blog New 64-Bit OS and old software compatibility
If you get .DLL register errors and on your old 32-bit system the fix was to put them into the System32 dir and register them, try dropping it into the SysWOW64 folder instead.
For those that don’t know, WOW means Windows On Windows. This has been around since we went from
the 16 bit windows3.1 to Win95. Looks like we now have a 32/64 bit equivalent.
If you have trouble with dlls and ocxs on 64 bit machines remember the SysWoW64 folder and give it a try!