The reason for this is that Windows 10 doesn't support Safedisc, a DRM in many old games, anymore. So the gamers who bought games that used Safedisc can't run them on Windows 10. If that is not a good argument against DRM then I have never seen one.
Oh, according to an and a [url=http://www.computerbase.de/2015-08/kommentar-ein-kopierschutz-darf-nur-temporaer-sein/]commentary on ComputerBase (German only, sorry) no one feels responsible for this problem and the lapidary answer is either to get a No-CD-patch - which are AFAIK illegal - or to buy the game DRM-free again.

Edit.:
I should add that I only inadvertently marked this thread as a question. Sorry for the inconvenience.

DRM will bite you in the ass someday. Just like that.

doesn't that also mean that MS is indirectly fighting DRM?

Depends on whether MS removed the support because it was DRM or because it was to old.

Or because it was intrusive bloatware which acts like highly dangerous malware (just like nearly any other DRM). It is harder than impossible to fully clean your OS after all this SafeDisk and similar crap got through without fully reinstalling OS from scratch (and probably reformatting disks).

SafeDisk will not be missed. Good riddance.

Apparently, it's a side effect of what Microsoft would probably call "security measures".
Win 10 doesn't allow software to integrate itself into the system in the way that Safedisc's drivers do, so it doesn't work.

As if that'll do anything for actual security of the system.

I did a quick research on this safedisc topic, because I imaged lots of game with this infamous technology. Some of these are Traditional Chinese and Japanese title, which I cannot find a digital retail store even I want to buy them again.
In theory I have few solutions but not tested yet. Feel free to discuss.
1. Revert to Win 8.1 or older.
2 of my notebooks upgraded already and don't want to do this, but will make a clean install eventually.
2. Grab a Win 8 image and run it in a VM.
I'm in doubt it will violate the EULA...
3. Make a test-signed secdrv.sys as various site suggested.
Quite troublesome and I found 3 of this file in different size, not knowing which one is correct...
4. Use a third party tools to make a No-CD on your own, instead of downloading. A PC with old Win required.
Some cracked EXE may contains virus which I would like to avoid. Home-make maybe a better option given the tools is not infested...I tried to download Unsafedisc but Firefox prevent the it. However Safedisc 2 Cleaner downloaded successfully.

More about point 4...
Tried the Cleaner today but it required the game can run normally, which we cannot do it with Win 10. Somehow you need a old Win to do this as I said.

Luckily I have a old desktop with XP license, but it is a pure xubuntu right now.
Planning to run XP in VM, home-make the No-CD, test it and store them somewhere safe...

How come people buy games legally has to suffer these DRM things...

deleted

+1 to that. I never upgrade, plan to upgrade, or even start caring about new OS releases when they first come out and generally plan to stick with my current OS release until the vendor officially terminates their final level of support for it, which in the case of Windows 7 is January 2020 IIRC. So it's not something I need to think or care much about until the final months of 2019.

Having said that, I've already seen enough media and blog articles highlighting features/functionality built into Windows 10 that are unacceptable to me, many of which fit into the category "gross invasion of privacy" to say the least, so there's a very close to zero chance I'll consider upgrading to Windows 10 or anything Microsoft comes out with after that either, and I have no interest in Windows 8.x either for $reasons.

So while there are 4+ years left for me to be able to simply "not care", from the way things look right now I can predict that the more likely path that I will take is to end up migrating most of what I currently run in Windows to Linux including gaming. Those games that still wont run in Linux easily in 2020 (whether natively or via wine or other technologies) that I wish to play I'll probably try running in virtual machines running Windows 7 fully updated under Linux with little to no network connectivity essentially in a harmless sandbox isolated from potential networked security threats, or alternatively run them on a separate PC with Windows 7 similarly isolated from the network.

One thing I wont do is compromise my own principles and values beyond a certain point that matters to me personally though, even if that means I have to give up using certain games or other software. Worst case scenario, I'll give up games entirely and play guitar more.

OK. What is the question?

There is no question. I just inadvertently marked this thread as a question. Sorry that.

Agreed.

I've pretty much written-off the idea of ever upgrading to Windows 10.

But another consideration to keep in mind now is that MS is likely or even has already started pushing privacy-invading updates to earlier Windows (like Win7); with the idea to snoop on us that aren't going to upgrade due to the snooping.

Example

Example

I might not even update my Win 7's anymore. Really don't like his heavy-handed snooping.

How long before there's some "breach" where MS loses all your private data they've been gathering and it gets into the wild - never to be bottled back up - always available for identity thieves and so on.

[url=http://arstechnica.com/tech-policy/2015/08/target-agrees-to-pay-visa-card-issuers-up-to-67-million-for-2013-data-breach/]happen [url=http://arstechnica.com/business/2015/02/50000-uber-driver-names-license-plate-numbers-exposed-in-a-data-breach/]the [url=http://arstechnica.com/security/2015/06/hack-of-cloud-based-lastpass-exposes-encrypted-master-passwords/]these days.

I'm not willing to let MS hoover up my budget, banking, and otehr private stuff - only to see it get leaked to hackers down the road.

Hell no.

I'm afraid that if that computer intends to stick on the internet until it dies as well, that is a very bad idea (EDIT: unless your computer will die before 2020 as Skeletonbow highlighted). Just as it's a bad idea to put an XP machine on the net right now, some day that will be the case for Win 7. In fact I expect MS will be more aggressive with their support cut off for Win 7, after the difficulty they've had moving people from XP.

If you don't intend to move with the times on Windows (which is a perfectly reasonable intention), then you'll need to jump onto the bandwagon of another OS. Staying where you are is not a good idea.

Given how the US government -and all governments really- like to hack into others data to get "vital information", and MS want to add their own monitoring services to all the active OSes. Not long. Not long at all.
Then again we all use the internet knowing that anything we do here is both up for future criminal charges and for sale.

People say they are sticking with Windows 7.

The day they use Windows 10 will be the day I laugh at their face. And yes, the day will come, sooner or later.

Being dumb is a part of humans' daily routines it seems.