Instant and Practical Hacks to Fix QuickBooks Error Code PS101 You may get into QuickBooks error code PS101 while updating QB or the payroll tax table. The reasons that can be responsible for the occurrence of this problem are wrong internet connection settings, incorrect firewall settings, and invalid web browser settings. Furthermore, it may arise due to third-party settings that are not properly configured. Therefore, we have conducted deep research and compiled this blog for you. Delve deep into the page to gain useful insight from it. However, we advise you to consult a professional to permanently resolve QB error PS101. Dial 1-855-888-3080 and get instantly connected with our certified QB experts. What Triggers QBDT Error PS101? It is a list of the reasons that can lead to QuickBooks error PS101. See what those are: This error can occur due to a damaged CPS folder file. It can happen if the third-party anti-virus settings are not properly configured. When the web browser settings are not valid, you can get into this problem. It can be due to the wrong internet connection settings. The firewall settings might be blocking you from getting updates. Step-by-Step Guide to Solve the QuickBooks Error Code PS10 1Let's move on to solutions once you fully understand the causes of this issue. Configure firewall settings Open the Run window by pressing Win+R. Search for Windows Firewall and open it. Go to the Advanced Settings. Right-click on Inbound Rule and choose Create a New Rule. Tap on the Port button, followed by Next. Confirm that the TCP option is marked. Now, hover over the Specific Local Ports field. Enter the port number based on the QB year version: QuickBooks Desktop 2020: 8019, XXXXX. QuickBooks Desktop 2019: 8019, XXXXX. QuickBooks Desktop 2018: 8019, 56728, 55378-55382. QuickBooks Desktop 2017: 8019, 56727, 55373-55377. After you have entered the port numbers, choose Next. Tap on Allow the Connection, followed by Next. Here, you need to ensure that all profiles present there are marked. Click Next if they are all marked. Create a rule and name it as QBPorts(years). When done, tap Finish. Follow the steps again to create an outbound rule. After this, open the QBDT application and switch to multi-user mode. Install QBDT in Selective Startup mode Press Win+R to open the Run window. Type msconfig and hit Enter. Head over to the General tab. Choose Selective Startup and Load Systems Services. Move to the Services tab. Click on Hide all Microsoft Services. Click on Disable. Untick the Hide all Microsoft Services checkbox. Mark the Windows Installer box. Click OK and head to the System Configuration window. Choose Restart. Reinstall QB and open the Run window again. Type msconfig and hit OK. Choose the General tab. Click Normal Startup. Tap OK and go to the System Configuration tab. Choose Restart. Summary At the end of the blog, we can say that QuickBooks error code PS101 mainly occurs due to wrong firewall settings. Other possible origins are precisely mentioned in the section above. Along with this, you have been given a set of resolutions for it. For more information, give a call to 1-855-888-3080 and talk to a QB advisor.