Hey there! @TheRozb, Welcome to HP forums.
I understand that omen control center is not working in a non-admin account.
Please give administrator permission, for the other user account and check.
Please try the steps recommended below.
1.From the Windows desktop, click the HP OMEN Control icon.
2. Under Profiles, click the + icon to create a user profile.
3. Type the name of the user profile.
Please refer this user manual for more information.
Note: Refer page 14 for more information.
Also, if the issue persists, Please provide the product number of your PC.
I will try to find the best solution.
Let me know if this works!
Have a wonderful day ahead!:)
A4Apollo
I am an HP Employee