I'm using TurboTax Business 2022 on Windows 10. The Updater just says: Waiting for the installer service... I've restarted the computer. It won't update the program

[BizApp User]

For a paid service, I didn't realize it's difficult to get support.

Please help. It just keeps saying "Waiting for installer service..."

I've done all the steps I could find to remedy the issue of "Waiting installer service". It just stays there. I tried the Scan Now on command prompt as well to repair any broken windows file. I also tried uninstalling and reinstalling TurboTax. I also tried restarting the installer services. Nothing is working. While one update went through after reinstalling, it still won't complete the update. It just stays on "Waiting for installer service..."

[EbonyA]

You may try doing a manual update.

[Bbmaj7b5]

I've solved this issue. Right-click Start and open Task Manager (or open by hitting ctrl+alt+del and selecting Task Manager).
Under the Details tab, navigate to msiexec.exe, right-click on it, and terminate the process (End task). Open TurboTax and attempt to install updates immediately. 

[KC1982]

Windows TurboTax Desktop Deluxe 2024 version

I had the same problem "waiting for installer service" even after Windows reboots.

I couldn't find msiexec.exe in Task Manager Details or Task Manager Services

But I did notice that Task Manager Services msiserver was stopped. I started it and then my updates went through immediately. Hope this helps somebody in the future.