Powershell shutdown script issues

Question

Hi Scripting Guys!
I'm working on a project to optimize school computers in my region(mainly boot/startup time). As all the students are local administrators it often results in them installing various programs, programs that more often than not, is set as a start-up program,
which obviously effects the start time.
So i decided to make a powershell script to go in and edit the registry for startup programs, with the intent of making it a shutdown script to be applied through a group policy.
But the script wont run.
Trying to run it manually works fine.
I've set execution policy to both all signed and remotesigned/unrestricted(i have signed the script though)
I've disabled the UAC as it gave me some issues during testing
I am a powershell rookie though so i'm sure i've missed some obvious mistake, either in the script or settings so i'm hoping you can assist me or point me in the right direction.
The script looks something like this:
Remove-Item -Path hklm:\Software\Microsoft\Windows\CurrentVersion\Run
New-Item -Path hklm:\Software\Microsoft\Windows\CurrentVersion\Run\ -ItemType Key
New-ItemProperty -Path hklm:\Software\Microsoft\Windows\CurrentVersion\Run\ -Value '"C:\Program Files\path to some driver.exe"  -PropertyType String -Name "name of some driver"
bonus info:
i'm testing in a virtual inviroment using a Win2008r2 Domain controller with Win7 clients
From the clients, using rsop.msc, i can see the script, and the path, I can also see the attempt to start the script in eventviewer and it even says its finished about 2 seconds later. (rsop shows no last execution time)
Kind regards
Powershell rookie

Answer 1

Hi
The purpose of the script is not to install any of the drivers but rather starting them up(or something like that) like start only essential drivers like the anti-virus software and mousepad drivers for laptops. So basically the script is supposed to delete
the run folder in the registry database and then recreate it with only selected drivers.
I hope i'm making sense?
Regarding disabling all of first line security on my entire domain i'm not sure i follow? how will a shutdown script that edit the startup registry on my domain computers disable all that?
Thanks