Simple method to resolve QuickBooks Error 21
                     Practical strategy to rectify
 QuickBooks Error 21
QuickBooks is bookkeeping software that assists small businesses to grow by 
managing their accounting and analyzing the data to create precise financial 
reports. The software also helps in employee payroll and automatic tax 
calculations at the end of the fiscal year. Unfortunately, QuickBooks also 
gambles with random issues like any other software. QuickBooks Error 
21 develops while installing the software or accessing the company file due 
to a missing registry code. If your QuickBooks also gets affected by this 
error, go through this blog to understand the causes of this issue and the 
techniques you can use to terminate it
Fix the issue with the assistance of a QB support team available at 
+1-855-948-3646.

Reasons
The conditions which provoke the development of this QuickBooks error are 
mentioned below-
1. A registry code required by QuickBooks to access the company file is 
missing.
2. QuickBooks data has been infected by a virus and has now turned into 
an unreadable format for the software.
3. QuickBooks fails to acquire the necessary system resources to run 
smoothly on your PC.
Solutions
This series C error in QuickBooks can be tackled by executing the methods given below-
1. If you faced this error while installing QuickBooks follow this method-
Solution 1- Repair the Windows registry using the command 
prompt
This error can stop you while accessing a company file or when you install QuickBooks on 
a computer. A significant reason for this error is a damaged Windows registry or a missing 
registry code required by the software. You can fix the issue using a command prompt in 
Administrator mode. Before proceeding, you must acknowledge that this will impact the 
system configuration, so you need to follow the steps underneath accurately-
1. Click on the search panel and type Command.
2. Before hitting Enter, press and hold the Ctrl + Shift key altogether.
3. A dialogue box of Windows Command Processor will appear on the screen 
asking for confirmation to make changes to the device, click Yes.
4. This will launch the Command prompt in Administrator mode.
5. Type regedit on the blank screen and tap Enter.
6. Go to the File option at the top and select Export in the drop-down menu.
7. Enter any desired name for the backup file. Close the menu and single-
click on the Export range box.
8. Add .reg as an extension to the file name and save the settings.
9. A backup for your Windows installer file be created, and you can try 
installing QuickBooks again on your PC.
The software installation won’t be affected by any issues now.
1. If you encountered this error while working on your QuickBooks, use the 
following method-
Solution 2- Run QuickBooks in Administrator mode
QuickBooks can struggle to run if it isn’t allotted the required system resources 
to run smoothly and access the files on the drives. Refer to these steps-
2. Search for QuickBooks and right-click its launch icon in the search results.
3. Tap Run as Administrator and execute the task that caused this error in 
the beginning.
The error won’t create problems for you anymore.
Conclusion
This blog clarifies the details of QuickBooks Error 21, which can be 
troublesome while installing the software or using it normally. You read about 
the causes of this issue and the countermeasures, which we hope you applied 
and the error is resolved from your QuickBooks.
Consult a QB support team at +1-855-948-3646 if you encounter any 
issues while applying the solutions.