sed2.exe installed; tests executed after install:
Test 1: AV OFF, Launched game normal mode (not admin) - Works
Test 2: AV OFF, Launched game as Admin - Works
Test 3: AV OFF, Launched game normal mode - Does Not work
Test 4: AV OFF, Launched game as Admin - Works
Test 5: AV ON, Launched game as Admin - Works
Test 6: AV ON, Launched game normal mode - Does not work
In BOLD same test, but the first right after install and the later at second start+; For some reason it's not working without admin mode after the first launch, and I'm glad to know it's not the AV's fault, even though it has an auto-sandbox module it can be overwritten and ask for the users' opinion, that's why I was sure it wasn't running on sandbox mode.
Anyways, sed2.exe is working, maybe just tell people to run the game launcher as admin and see if they have any results
EDIT: The "Works" and "Does not work" refer to mods from the pack that were not working as I first complained.
EDIT 2: THIS IS AN IMPORTANT EDIT!!! Only after I installed sed2.exe I saw the game even work with all the mods, even if only at the first launch, all other installers failed. I did not try the sed3.exe though, but can test it if you want Aslain
EDIT 3: Why on Earth is my computer refusing to read the files it first read right after the modpack install... I can't come up with an answer...