A Quick And Easy Guide To QBCFMonitorservice Not Running On This Computer
                     Steps To Fix 
QBCFMonitorservice Not 
Running On This 
Computer Issue
QBCFMonitorService helps in the establishment of the multi-user network and 
tracks the data that is transferred on it. But several factors can stop it from running 
or cause a malfunction. QBCFMonitorservice Not Running On This 
Computer has become a common issue nowadays, which stops users from 
working on their company files. If you also become a victim of this similar situation, 
find out the reasons for this issue by reading this blog and also learn the 
techniques to resolve it from your PC.
Resolve this error quickly with the assistance of a team of QB experts available 
for your assistance at 1.855.856.0042.

Reasons
QBCFMonitorService plays a major role in setting up the multi-user network and 
monitoring the data traffic flowing through it. It can sometimes malfunction due 
to the reasons described below-
• QBCFMonitorService isn’t allowed to run due to restrictions imposed by the 
Windows Firewall or antivirus on your PC.
• Background processes related to the QBCFMonitorService are interrupted by 
minor issues or interruptions of other applications.
• QuickBooks isn’t able to find the data file as it is moved from its default 
location or the drive containing it has been disconnected from the system.
Solutions
Your QBDT will generate issues when you try to open your company file and set up a 
multi-user network if the QBCFMonitorService stops running on your PC. Here is the 
method to tackle the issue-
Solution- Set up the Windows Firewall settings 
correctly to protect your QB from getting blocked
You mostly run into this error while using the multi-user network or executing a 
data file-related task. This happens when Windows Firewall restricts QuickBooks 
from performing its functions and blocks its background processes. It might be 
possible that your antivirus has blocked some QB files, leading to the QBDT’s 
malfunction. You are suggested to turn off the antivirus temporarily and then try 
running the software. Apply these steps afterward to fix your Windows Firewall 
settings-
• Open the Run window and type ‘Control Firewall .cpl’ to open the Windows 
Defender Firewall menu.
• Click the Inbound Rules option in the left menu and select New Rule in the 
firewall window.
• Select the Port option in the following tab and tap Next.
• When you see UDP &TCP options on the screen, select the TCP option to 
proceed to the next window.
• Hover over the Specific local ports option& enter the new firewall port 
according to your QB version from the list below-
1. QuickBooks Desktop 2017:8019, 56727, 55373-55377
2. QuickBooks Desktop 2018:8019,56728,55378-55382
3. QuickBooks Desktop 2019:8019, XXXXX
4. QuickBooks Desktop 2020 and recent:8019, XXXXX.
• Enter the correct ports and click Next.
• Single-click Allow the connection and click the Next option to create a new rule 
with any name you prefer.
• Hit Finish, at last, to save the changes, and try running QuickBooks again.
After the firewall ports are configured, use the following steps to restart the 
QBCFMonitorServicein the background-
1. Open the task manager (Ctrl+Shift+Delete) and navigate to 
the Processes tab.
2. Search for QBCFMonitorService.exeand single-click on it.
3. Hit End task to stop the process instantly and reopen QB to restart the 
process.
Conclusion
We are now at the end of this blog explaining the reasons for QBCFM
onitorservice Not 
Running On This Computer. The blog also contains the methods you need to 
eliminate the problem, and we hope you’ll apply them to fix the 
QBCFMonitorService.