http://murc.ws/ Covers any hardware or software. en Tue, 12 May 2026 21:17:58 GMT vBulletin 60 images/misc/rss.png http://murc.ws/ http://murc.ws/forum/hardware/general-hardware-software/1037744-old-windows-11-versions-bad Mon, 04 May 2026 09:41:12 GMT Hello, How bad is it to run older Windows 11 versions? I have an old laptop (Core2Duo) on which I can install Windows 11 23H2 - it is of course not officially supported, but works. It is the last version that works on those CPUs, due to the fact that the next versions requires some CPU...
How bad is it to run older Windows 11 versions?

I have an old laptop (Core2Duo) on which I can install Windows 11 23H2 - it is of course not officially supported, but works. It is the last version that works on those CPUs, due to the fact that the next versions requires some CPU instructions to be supported (SSE 4.2, POPCNT) which those older ones do not have.

According to https://en.wikipedia.org/wiki/Window...ersion_history , 23H2 is also end of support. Does this mean they won't bet any security updates (e.g. just like Windows 10)? If that is the case, which is the better option: Windows 11 or Windows 10 (assuming drivers work and exist)? There does not seem to be much in performance.

I also have an Atom on which I tried to install Windows 11 but failed (only later I learned I should have tried 23H2, so I'll have to try again). One issue I have on the Atom is that - in Windows 10 - there are very large number of interrupts (in task manager, taking up over 90% of the CPU), and I cannot seem to pinpoint the cause - I've switched off all onboard hardware but it does not change it. These interrupts drop when the task manager is open for a longer time. It makes Windows 10 rather unusable on this system. I've tried installing Linux, but the system is quite critical what it boots from and I have problems creating a bootable disk from which it installs linux. Now that I learned about the 23H2 supporting older CPUs, I'll give that one a go. I will also try more to install Linux. I know the Atom is very low powered, but it could be enough to work as a terminal to connect to a more or less headless computer (my htpc which is only connected to a projector that makes it only usable in darker circumstances), or to my work.

Thanks]]> General Hardware/Software VJ http://murc.ws/forum/hardware/general-hardware-software/1037744-old-windows-11-versions-bad