Thank you for posting in the Community, quiltmaker. Let me provide and share information about why you're unable to update your Intuit Data Protection (IDP) in QuickBooks Desktop (QBDT).

Let's utilize the IDP Diagnostic tool to identify any issues with a firewall or third-party security software that may prevent you from updating to the latest version.

Here's how:

1. To find the Intuit Data Protect (green padlock) icon in the Windows System Tray, which is usually at the bottom right of your screen, right-click on it. Then choose "About Intuit Data Protect."
2. On your keyboard, press Ctrl+F2 to launch the Intuit Data Protect Diagnostics Tool.
3. Click Run Diagnostics. If the Diagnostics Tool identifies a problem with a firewall or third-party security software, it will be necessary to reconfigure the software and/or hardware to permit access to Intuit Data Protect files. For instructions on how to configure your security software and/or hardware, please refer to your manufacturer’s website. Then, make sure to add the following files as exceptions.

• C:\Program Files(X86)\Common Files\Intuit\Data Protect\IntuitDataProtect.exe
• C:\Program Files(X86)\Common Files\Intuit\Data Protect\IbuEnghost.exe
• C:\Program Files(X86)\Common Files\Intuit\Data Protect\QBIDPServices.exe

Once done, add the Windows Firewall ports. you can follow this article to guide you to set up firewall and security settings for QuickBooks Desktop.

Then, download the latest update for Intuit Data Protect again.

Here's how:

1. From the Help menu, select Update QuickBooks.
2. Tap the Update Now tab.
3. Make sure you select, Data Protect from the list, then click Get Updates. Once complete, install the update again.
4.  Click the up arrow (^) on your desktop toolbar. It’s usually located in the lower-right corner near the clock.
5. Right-click the Intuit Data Protect icon and select About Intuit Data Protect. The icon looks like a green padlock.
6. Click Update.
7. When it’s finished, press OK.

And for an alternative way to update via OCD, you can also follow the steps above, from my colleague @JaeAnnC.

If the issue persists after trying out the process, I recommend contacting our Customer Care Team Support so they can look into this issue further and find a possible fix.

You're always welcome to tag my name in your comments if you have other concerns about Intuit Data Protection (IDP). Just hit on the Reply button, and I'll get back to you. Have a good one.