Hi Jamie,

Abacus Billing Popup is a program developed by American Reprographics
Company.

You can uninstall Abacus by using the Add/Remove Programs option.

1. Click Windows Start, and then click the Control Panel item.
2. Click on Programs and Features.
3. In the Programs and Features window, Right-click Abacus. Once Abacus is highlighted, click on the Uninstall button.

Once Abacus Uninstall window appears, it will ask you if you're sure you wish to remove Abacus. Click Yes to start the uninstallation process. This will start the uninstallation process.

If you are still unable to uninstall it, then follow the below methods:

1. Using the Microsoft Fixit Tool

1. Visit Microsoft Support at https://support.microsoft.com/en-us/mats/program_install_and_uninstall
2. Click the Run Now button under "Fix problems that programs cannot be installed or uninstalled."
3. Click the Run button when your browser asks if you want to run the installer.
4. Click Yes if User Account Control asks for authorization to make changes.
5. Click Accept in the Fix It pop-up window to complete installation.
6. Select Detect problems and apply fixes for me from the dialog box when Fix It starts.
7. Select Uninstalling when prompted for the type of help you need.
8. Select the program you wish to uninstall from the list and click the Next button.

Use Registry Reviver
Registry Reviver will scan your
Windows registry for problems. Registry Reviver can repair, maintain
and optimize your registry to restore optimum efficiency and
effectiveness to it, and to your PC.

You can find it at the below link:
http://www.reviversoft.com/registry-reviver/


I hope this helps in removing the tool.

Regards,
Lokesh