Let me step in and provide some steps to boost the performance of QuickBooks Desktop Pro, Kristine Mortimer.

A company file size that is more than 150 MB needs to use the QuickBooks Condense Data Utility to reduce it.

Aside from that, I listed several solutions below to improve the performance of the program.

Solution 1: Update QuickBooks Desktop Application

Follow this article Update your QuickBooks to the latest release.for detailed steps. This makes sure you have the most recent fixes and security update.

Solution 2: Rename QBWUSER.INI File

1. Open Windows File Manager by pressing Windows + E keys on desktop.
2. Navigate to C:\ ProgramData\ Intuit\ QuickBooks folder.
3. Make sure Windows is set to Display Windows Hidden Files.
   

   

4. Locate and right-click QBWUSER.INI file.
5. Select Rename and add .OLD at the end of the file name.
6. Save the file name and try to run QuickBooks Desktop once again.
7. If QuickBooks is still running slow, then follow the next troubleshooting step.
   
   

Solution 3: Verify the Windows System Configuration

Following is the minimum system requirement that needs to be fulfilled in order to run QuickBooks Desktop efficiently:

1. Core 2 Duo Intel processor 2.4 GHz minimum or any upgraded version.
2. 4 Gigabytes of RAM.
3. 5 Gigabytes of free disk space after installation.
4. Optical Drive or connectivity to the internet.
5. 1280 x 1024 Screen resolution.
6. US version of Windows that must be either Windows 10, 8.1 or 7.
7. Installation on a server requires Windows Server 2016, 2012 R2, 2011, or 2008 R2 SP1.

Solution 4: Reinstall QuickBooks Desktop

1. Download QuickBooks Tool Hub.
2. Open the setup file from the downloads of your computer and follow the on-screen prompts to finish the installation.

   

3. Open the file you downloaded (QuickBooksToolHub.exe).
4. Click the Program Installation Issues tab and click QuickBooks Clean Install Tool.
5. Run the tool to install a fresh copy of QuickBooks Desktop application.
6. Use the QuickBooks Clean Install process and reinstall QuickBooks Desktop application on your Windows computer.
   
   

Keep me posted if there's anything else I can help you with QuickBooks. I'll be right here to provide the information you need.