For the past few years I dual booted windows 10 and Ubuntu Mate without much of an issue. I had a few issues that I worked through with the Mate Community but for the most part Linux always worked, unlike Win 10. I needed a new laptop in January and that machine came with Windows 11. I installed the newest Ubunutu Mate (24.04) in a dual boot. Since then, I have had lots of problems with linux. I had a link that was created that could not be removed. The only way was to completely remove ubuntu and start over. On my restart, I installed the cinnamon desktop and found some new glitches. I tried multiple times to install windows 11 through virtual box. I read many help articles to try to get it to install, but it never worked. And then there was an issue with the network wifi. The wifi would completely stop on its own, usually running on battery. After several attempts to fix it, I decided to get rid of cinnamon and go back to Mate. On my reboot into Mate, linux decided to not recognize my password anymore so I could not get into the desktop. Has anyone else experienced more problems with Ubuntu 24.04? Maybe I can dowload an earlier version of Ubunutu instead.
Yes, the installer of 24.04 is in my opinion an utter disaster.
22.04 was painless, upgrading from 22.04 to 24.04 was also no problem, but a fresh install of 24.04 was, due to a lot of issues, problematic and I had to put some work in to get it play nice.
I kept a kind of log here on this forum about installing on several computers.
The story of installing the pre-alpha and my 22.04 -> 24.04 upgrade path
And later on in that thread the story of a fresh install of 24.04.1
Sorry to hear the troubles. Since you mention it was a new laptop, I wonder if it's purely down to poorer compatibility with this newer hardware, especially if it was bought some months ago.
When it comes to Wi-Fi dropping out on battery, that sounds like power management driver related quirks (that even goes beyond my understanding). It really depends on the chipsets that the network adapters use - some are better supported then others. Shopping for the right laptop "that just works with Linux" from mainstream OEMs can be challenging.
I remember a decade ago, Ubuntu 11.10-12.04 was causing my USB Wi-Fi to drop out — It wasn't until 12.10 when it was stable again. That was a kernel thing, so perhaps the next LTS next year, 26.04, with the newer kernel might be more stable with your hardware.
If you had stability with 22.04, I would stick to LTS (long term support) releases, as their core Ubuntu components are supported for 5 years. You can still download it here. Although, since this is a newer / different laptop, your experience might just be as buggy if it's because the newer hardware.
For the VirtualBox problem, feel free to create a new topic and we can help troubleshoot why Windows 11 won't install for you.
Sounds frustrating!
I've had past experiences where it has not been smooth. It really sucks going from something that runs brilliantly (I am super happy with my current setup) to a plain old brick 
.
There have been one or two glitches in the desktop applications with 24.04, and I had to build blueman, but this wasnt all that different to my time with 22.04. I can't corroborate @tkn's experience because I had no problems with a clean install.
There's a pretty decent community here who would be willing to help with each issue, but it does take a bit of 'back and forth', time, and patience. Hopefully it can be fixed.
Well since it is my first Ubuntu I myself have no knowledge to compare it to its predecessors but I do enjoy it much more than I did enjoy Mint MATE and have no problems I could not solve so far. But I tend to read a lot about how dual boot is getting harder and harder and mainly because Microsoft doesn't like it or wants to support it and sometimes updates just ruin the dual boot setup as is mentioned here recently: https://www.reddit.com/r/windows/comments/1iphk17/windows_11_ruins_dual_boot_again/
So I think it may be also a Windows update that is messing with your linux boot if it is on the same disk
Also a known issue:
I've given up dual boot Ubuntu / Windows some time ago (around 2017). The issues with each Ubuntu / Windows Update... no, but definitely NO, thank you!
Bought a notebook for the Windows activities (mostly for watching DVB-T2 TV using a program that is available for Windows only! I know about Kaffeine, I use it on my day-to-day rig running Ubuntu MATE 24.04 - not that comfortable when compared to the Win program).
Sorry for not being able to help here any further. Just wanted to point out that "dual boot" with Windows was a pain in the a.s for me and I'm not willing to "play this game".
A suggestion for the dual boot-ers: Windows does play better when left on its own separate disk — or in the laptop's case, an external USB SSD drive or USB to SATA adapter (if you have a 2.5" SSD lying around)
= 
+ 
It could be easily created as a Windows To Go-like thing using Rufus, so it'll be portable too. Only plug in the devil when you need it, and "disable" the other disk controller with Device Manager so it can't touch it 
- Usually F12 or F8 when powering up brings up an alternate boot menu.
Secure boot can be annoying, things are smoother when that's left off... but Windows 11 expects it to be mandatary on*! 
* Or not, using the registry 
Regarding Wifi: I recently purchased 2 lower end computers from ASUS. In one, the wifi card wasn't recognized and in the other, wifi worked but when you went to watch a video the machine slowed to a crawl. It turned out to be the wifi card. I replaced both with an Intel card (AX 210) and everything works. I've found Intel cards to be the most compatible with Linux. I have 2 higher end computers from ASUS and they both had Intel cards installed.
You might want to check what kind of card you have. You can install and run hardinfo and look under PCI devices.
Just another avenue to consider.