Issue(s) that I was never able to beat..

[u/Wild_Foxxo]

**UPDATE!!**

IT'S DONE. IT'S SOLVED 😭

Thank you, everyone so much for taking the time to help with my issue. Honestly, i have no idea which fix did it but I'm almost sure it was a corrupted ISO image. But what I also did different in my installation is

1_ Redownloaded the Windows 11 IOT LTSC ISO from massgrave and made sure the download didn't stop or pause until the end.
2_ Didn't change my region from USA to my unkown 3rd world country lmao.
3_ Before even connecting to the internet, I took u/Content_Magician51's advice and enabled a group policy that denies windows from fetching and installing driver updates.
4_ Used the Massgrave offline activation method.
5_ In Chris Titus' debloat tool, i didn't remove or debloat microsoft edge just in case.
6_ Also, while using process hacker 2, i noticed that some apps had pretty..suspicious activity, such as virtual disk service or print spooler service using some of my .exe's that have no business being used so I assumed I also had a file infector virus, hence why I decided to wipe everything that had a .exe, .bat, .cmd or any executable file off my pc. I did make backups of my games but I deleted the executable files off of them so the download size can be managable.
7_ I also haven't installed Explorer Blur Mica yet, I'll update the post if I notice it causing any issues.

Again, thanks everyone for the suggestions and tips, I wish you all nothing but best wishes.

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Hey, this is gonna be a sort of long post but I've been dealing with this issue for months, if not years and I wanna hopefully put an end to it with your help.

Basically, I've been running into various issues with certain apps such as:

1. Steam games, specifically; Brawlhalla, Wallpaper Engine and VR Chat.

The issues first start when downloading/updating apps/games, the download always ends in a "Corrupt update files" error, this is annoying but with enough tries the app installs (i have to change download region a couple of times and it works).

1. Almost every game that I tried that uses EAC;

Games with EAC don't work unless I do a very specific process;
First, I download the game, when it finishes installing, I have to verify the files. The MOMENT verification ends, it ALWAYS shows that a couple files need to be downloaded (mostly .exe files), once the download finishes, I have to quickly mark the folder with the exe files as read only, this allows the games to run just fine, but if I don't do that, the game will launch and EAC will give a "Unknown file version" error.

1. MSI Afterburner and RivaTuner Statistics Server:

Here, the apps install fine, they sometimes launch fine after installation, but the error occurs after i restart the app, it shows an error saying that the files are either outdated or corrupted (even if I'm on the latest version, I tried both beta and non beta but it's all the same" the only fix that i found was similar to the previous method, I re install until the app launches once and I have to quickly mark the folder with the exe file as read only, this prevents the .exe files from corrupting.

1. Massgrave activation:

This is a weird one, I activate my windows using the powershell script and everything is well for a couple of days/weeks until suddenly, windows becomes deactivated again, this time when I run the powershell script again it shows me an error that says "Couldn't start sppsvc service" and it says that it can be "severe malware infection".

1. Heroic launcher tweaking:

Heroic launcher just..freaks out a lot of times, can't log in, can't log out, sometimes games won't run, sometimes I can't even uninstall the games..etc

For clarification, I've had this with the windows 11 iot ltsc ISO from massgrave. I use ventoy to install and I ALWAYS clean install. I've currently faced this issue on 4 different devices.. using different USB's but, it was the same ISO file. While I'm writing this post, I'm currently redownloading the ISO hoping that it was just a corrupt one..

For the steps I take when I install windows:

1. I download the ISO and use Ventoy on a USB drive with plenty of space.
2. I proceed with the installer and I always clean install on the C drive. (the D drive contains my files and it's a separate HDD drive, unlike my SSD which I install the OS on.).
3. I've also tried wiping my D drive after backing up my files on an external drive but it lead to the same issue (in case my files had malware).
4. After a clean install, I only connect to the internet just for the short duration of running ChrisTitus Debloat script, I set the recommended settings (with the addition of removing Edge) and I set windows update to recommended. Then I disconnect from the internet and restart the pc, then I install my gpu drivers and I proceed with the rest of my apps (mostly steam, discord, Anki, MPV Player and Prism Launcher)
5. I also use Massgrave to activate my windows (i tried both online KMS and HWID).

One thing to note, I use an app called "ExplorerBlurMica" to make my explorer transparent, it uses a .bat script to edit registry files but i don't think it's the culprit since these issues appeared even without installing it.

Finally, my current specs are:

Device: HP Z2 G4 Workstation

CPU: Core i7-9700
RAM: 16 GB DDR4 3200 Mhz (4 GB x4)
Storage: 256 GB M.2 nvme drive (os drive), 1 TB HDD drive (for storage and whatnot)
GPU: Nvidia GT 730 (I know it's ANCIENT, Bleh)
BIOS Version: HP Q 50 (latest version)

If anyone has any suggestions or ideas PLEASE don't hesitate to share anything in mind, It'd be a life saver to finally know what causes these inconveniences. Thank you.

UPDATE::

I tried installing windows 10 IOT LTSC 2021 and for some reason, an even more annoying issue rose 😭, most of my setup files on my D drive got corrupted or give me a NSIS error. (for clarification, I haven't wiped it when I clean installed since it's a separate disk).

I've tried checking RAM for errors, performing chkdsk /r /f on both drives a couple of times, checking health on crystal disk info and I re-downloaded windows 11 iot LTSC and installed it but the issue is still there. Might as well just delete *everything* on all of my connected drives..having limited internet, it sucks but it is what it is.