SureAI

*Ignore*OK in detail: I have downloaded the package which contains these files: Data folder and 3 SKSE files and I placed all 4 inside skyrim folder. Then I downloaded the Enderal Launcher (6 times now) and I placed it in skyrim folder and on desktop. No matter where I place the launcher it doesn't start. I haven't installed anything through the launcher because it simply won't open
One thing I ve noticed is that everytime I run for the first time the launcher I ve downloaded, windows security detects it as harmful exe but I proceed anyway and whitelist it. I ve also checked the windows defender and it is not quarantined or locked from there and I don't have any other antivirus program.*Ignore*

I am making a fresh skyrim installation. I won't extract the package and I will run the launcher on desktop. Will tell you soon if it works

Run the launcher as administrator!

Now I have a clean Skyrim folder, the enderalinstall_EN.gz file and the launcher are on my desktop. I run the launcher with admin rights and again nothing happens
I ve also made a pc restart just in case.

Ok, lets see if the launcher can write in you steam library at all.
Could you look up if you have the following folder structure:
C:\porgrams(x86)\Steam\steamapps\common\Skyrim\EnderalLauncher

I put the launcher in the skyrim folder now and it worked. What did I do differently than before I have no idea
Thank you

I had this problem originally as well. I fixed it by manually copy pasting the launcher to the Skyrim folder (overwriting the launcher that was automatically copied) and forcibly exiting the previous instance of Enderal Launcher.exe.