It seems Nickellys is on the right track with the driver signing being the true issue with your software.
There is also an option to disable driver signing -
how-to-disable-driver-signature-verification-on-64-bit-windows
Selecting Windows XP SP 3 was sufficient to have the software running."
This should have nothing to do with DRM Blocking. Using Compatibility for an older OS sometimes helps to get
older software up and running.
It's only when there is a secdrv.sys file on the disk that DRM Blocking rears it's evil ugly head.
- From what I've seen, games with either SecuROM or SafeDisc have the secdrv.sys file on the disk.
Games or software without this file on the disk will not be blocked by the MS malware.
You may well have SECDRV.sys file in your Win10 install (mine is in sysWOW64), but DRM Blocking does not
prevent it's installation, only activation (fortunately for users of older software and games).
"One more point : the "sc config secdrv ..." or "sc start secdrv" commands work normally on my computer but receive an error message "service has been blocked" on the other computer."
How you are able to circumvent DRM Blocking on a Win10 machine is a mystery.
I hadn't tried the commands with Win10 as the support page with the commands only refers to Win8/8.1,
but when I tried them a minute ago the command was blocked. Which seems to confirm that
DRM Blocking is well and truly integrated into Win10 (using 1511 update, atm).
- Regarding 32 vs 64 bit.
Prior to the DRM Blocking issue, there are also a few instances of various DRM which don't recognise
64bit OS's as legitimate.
I have at least one game with what may have been more notorious than even SecuROM - StarForce
('protect.dll' ) - which will not will not allow the game to load on any 64bit OS
(with an error message something to the effect of Win7 not being recognised as a legitimate OS).
- I recall another game or two that would do something in relation to the DRM on rebooting the machine.
I don't recall the details (they were installed on Win7 years ago), but a noCD is required to run these games.
Games released between '04 - '06 are the most likely to have (non-Win10 DRM Blocking) DRM issues, such as these.
- Just two examples of how DRM punishes the legitimate user (or used to, as it's all on line one user activation
these days - say goodbye to second hand games ). Meanwhile the pirates laugh at the copy protection attempts. There can be times when a pirate is an honest persons hero.
.