Instant method to troubleshoot QuickBooks error 21
                     Termination strategy for
 QuickBooks Error 21
QuickBooks is an efficient accounting software that has a user base of more than 
a million people around the world. The software helps to reduce unnecessary 
expenses and helps user monitor their business health with precise financial 
reports. Unfortunately, the software can be a home for unexpected issues that 
can affect its output. QuickBooks Error 21 is one of the problems that stop the 
software from opening or while the user tries to access their financial data. In 
case you also encountered this error on your QuickBooks, keep reading the blog 
further to learn about the causes of this issue and the effective methods to deal 
with it.
Speak to a QB professional at +1-855-948-3646 to resolve this error 
quickly from your PC.

Reasons
You’ll come across this runtime error while launching QuickBooks or opening a 
company file due to the conditions mentioned underneath-
• The company file is no longer usable for the software due to damage caused by 
data corruption.
• The Windows registry is damaged due to a recent installation/uninstallation of 
the software, or a registry code required for QuickBooks cannot be found.
• QuickBooks struggles to run due to an old version of Windows on your 
computer.
Solutions
The methods described below are useful in troubleshooting this error-
Solution 1- Install the QuickBooks Tool hub and run the File Doctor 
tool
QuickBooks tool hub is an adequate means to counter day-to-day issues in the 
software. The tools available in the tool hub can diagnose the issues and resolve 
them automatically. You must install the latest version of the tool hub from the 
official website of QuickBooks to repair your company file, which might be 
responsible for this error. You can download the tool hub installation file of the 
tool hub from the Downloads & Updates page of the QuickBooks website. 
Follow the steps after the file is downloaded on your system-
• Double-click on the QuickBooksToolhub.exe file downloaded on your PC.
• Click Yes if the UAC settings dialogue box pops up, and follow the instructions on 
the screen to install the QuickBooks Tool hub.
• Click on the Company file issues menu of the tool hub and tap the Run 
QuickBooks File Doctor tool option.
• Tap Browse to locate your company file and select the Check your file option.
• Fill in your QB Admin password and let the tool mend the data file issues.
• Reopen QuickBooks after the file is repaired.
If you still encounter the error while opening the file, proceed with the following 
solution.
Solution 2- Update your Windows version
An outdated Windows can be the origin of many errors in your system 
applications. Here are the steps to update your Windows to ensure that 
QuickBooks hasn’t developed this error due to an old version of your Windows-
• Go to the search panel and type ‘Windows update.’
• Open the window and click on Check for updates.
• Tap the Download and Install option below the new version and wait until it 
is completely installed.
• Rerun QuickBooks.
You won’t be troubled by the error anymore after using the above-given 
techniques.
Conclusion
You have now read the reasons QuickBooks Error 21 develops in the software 
and the countermeasures you can apply to rectify it. We hope the error is now 
resolved and your QuickBooks is free from errors.
If you have any remaining queries, speak to a QB professional at +1-855-
948-3646 to sort them.