Are you looking for a guide that can help you overcome QuickBooks error 12002? If yes, you have landed at the right place. This blog covers all the information required to rectify such an issue. Moreover, this also assures to rectify other related problems, such as QuickBooks error 12009. The reasons why you get error 12002 are network timeout, unstable internet connection, firewall settings, and many others.

That’s why our experts have conducted deep research and compiled a comprehensive post. Get into the page and explore all the outlined segments.

If you are still unable to resolve QuickBooks error 12002, don’t hesitate to contact our certified professionals at 1.855.738.2784.

Common Causes You Should Know About QB Update Error 12002

Know the possible reasons that may trigger QB error 12002. Have a look at them:

  1. An unstable internet connection can lead to such an issue.
  2. The firewall settings are restricting QB from being updated.
  3. It can be due to a network timeout.
  4. In case you have not set up Microsoft Edge as a default browser.

Powerful Methods to Overcome QuickBooks Error 12002

After you have understood the factors that may trigger QB error 12002, it’s time to jump to its troubleshooting procedure. Let’s see what experts suggest and how to implement them:

Run QB TLS 1.2 Tool

  1. Open the QB Tool Hub.
  2. Choose Installation Issues.
  3. Tap on QuickBooks TLS 1.2 Tool.
  4. Click OK to open the tool.
  5. Choose Yes to the EULA Agreement.
  6. Choose Exit.

Configure the firewall manually

  1. Go to the Windows Start menu.
  2. Type Windows Firewall and open it.
  3. Click on Advanced Settings.
  4. Right-click on Inbound Rules.
  5. Tap New Rule.
  6. Click on Port and then choose Next.
  7. Ensure that the TCP option is chosen.
  8. Head to the Specific Local Ports field.
  9. Enter the port number according to the QB Desktop version:
    • QuickBooks Desktop 2020 and later: 8019, XXXXX.
    • QuickBooks Desktop 2019: 8019, XXXXX.
    • QuickBooks Desktop 2018: 8019, 56728, 55378-55382.
    • QuickBooks Desktop 2017: 8019, 56727, 55373-55377.
  10. After you are done entering the port number, you need to choose Next.
  11. Click on Allow the Connection, followed by Next.
  12. If you are asked, cross-check that all the profiles are marked.
  13. Click Next.
  14. Then, you need to create and rule with a name like "QBPorts(year)."
  15. After this, choose Finish.
  16. Then, you need to follow the above steps again to create outbound rules; instead of choosing Inbound Rules in step 4, select Outbound Rules.
  17. Open QB and switch to multi-user mode.

Reinstall QB in Selective Startup Mode

Step 1: Switch to Selective Startup Mode

  1. Press Win+R to open the Run command.
  2. Write msconfig and hit Enter.
  3. Head to the General tab.
  4. Choose Selective Startup and Load System Services.
  5. Move to the Services tab.
  6. Click Hide all Microsoft Services.
  7. Tap Disable all.
  8. Don’t mark the Hide all Microsoft Services checkbox.
  9. Choose Windows Installer from the services list.
  10. Click OK and move to the System Configuration window.
  11. Tap Restart.
  12. Reinstall QB from a valid website.

Step 2: Switch to Normal Startup Mode

  1. Press Win+R to open the Run window.
  2. Write msconfig and hit Enter.
  3. Head to the General tab.
  4. Choose Normal Startup.
  5. Click OK.
  6. Go to the System Configuration window.
  7. Tap Restart.

Closing Remarks

To outline the blog, QuickBooks error 12002 simply specifies an update issue with QB. In this scenario, you fail to get its latest updates and perform crucial accounting tasks. Along with this, we have outlined a couple of factors that can cause it. Try the solutions mentioned and get your QB back to its working state. For help, give 1.855.738.2784 a call and connect with a QB Pro Advisor.

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