How to grant "sufficient privileges to install system services" in Windows 11 Pro

Thank you for reaching out. I’ll be happy to assist you with this issue.

That message means the installer is trying to create or modify a Windows service, but Windows is blocking it because of permissions or security policies. Even if you are the administrator, certain installs can fail if the process is not explicitly run with elevated privileges or if group policy/security settings are restricting service installation.

Before we proceed, I'd like to ask a few questions to narrow it down.

1. Are you using a personal PC or a work/school-managed PC? Domain policies might be blocking it.
2. Is your account set as a local administrator in Windows 11 Pro?
3. Did you right click the installer and choose "Run as administrator" when you tried installing?
4. Have you recently made changes to User Account Control or Local Security Policy?
5. Does the installer name or documentation mention installing a Windows service?

Based on my experience, here’s what you can try:

Step 1. Right click the installer and choose Run as administrator, even if you’re already signed in as admin.

Step 2. Go to Settings > Accounts > Your info. Make sure it says "Administrator." If not, switch to an admin account.

Step 3. Type UAC in Start, open Change User Account Control settings, move the slider to Never notify, click OK, restart, then try the install again. Turn UAC back on after installing.

Step 4. Try to install in Safe Mode with Networking

Press Win + R, type msconfig, go to Boot, check Safe boot with Network, reboot, then run the installer as administrator. Switch back after installing.

Step 5. Check Local Security Policy

Press Win + R, and type secpol.msc. Go to Local Policies > User Rights Assignment > Log on as a service.

Add your account (or the administrator's group) to that list.

Step 6. If on a work device, check with your IT

Domain policies may be blocking service installation.

You can also check this link, which might be helpful in your case.

https://windowsreport.com/no-sufficient-privileges-install-program/

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

If none of these work, let me know the answers to the questions above and how these steps go.

Interesting. Got it, John. Thanks for trying the steps. It’s likely a permissions issue in the Windows service registry or remnants of a previous install.

Try these steps.

1. Press Windows + R, type services.msc, and press Enter.

Look for the SDD Scheduler Service or a similar service. If you find it, right-click > Stop, then go to Properties and set the Startup type to Disabled.

Or try this: open an elevated Command Prompt as administrator and run:

sc delete "SDDService"

2. Press Windows + R, type %ProgramFiles% and %ProgramData%, and delete any folders related to SDD Scheduler or your brokerage’s software.
3. Reset service installation permissions in the registry.

Note: Backup your registry first (File > Export in regedit). Be very careful when editing the registry; incorrect changes can cause system issues.

Press Windows + R, type regedit, and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services

If there’s an SDDService key, right-click > Delete.

Still in Regedit, right-click Services > Permissions, and ensure Administrators have Full Control.

4. Try installing in a clean boot

Run msconfig, hide Microsoft services, disable all others, disable all startup apps in Task Manager, reboot, then run the installer as admin again.

5. If that fails, install via the built-in Administrator account

Open Command Prompt admin and type

net user administrator /active:yes

Sign out, log in to the “Administrator” account, and run the installer from there.

After installing, disable it again:

net user administrator /active:no

Let me know exactly what happens after trying these steps, whether the installer moves past the Error 1923 or if it still fails in the same place.

I was unable to find the SDDScheduler, though I know it was installed at one time, so 1-3 were out. 4) yielded the following error:

1. did not work either.

I then tried to install the SDDScheduler directly and received the following:

I tried installing with the Windows firewall turned off and that didn't work.

Any other suggestions would be again be appreciated. At this point I'm not particularly concerned with security - I can always reverse any changes later. I just want to regain control of (what I thought was) my computer.

Thanks again

John