General Troubleshooting:
- Always try a reboot if the installation is in a funny state; the Windows MSI services sometimes schedules install actions to be performed on bootup if resources are locked during install/uninstall
- Always try removing prism via Add or Remove Programs (i.e. through the control panel) and reinstalling with an MSI installer obtained from https://support.eyos.one/hc/en-us/articles/115014268528-Installing-the-yRprinter-on-a-new-or-replacement-till
Symptom: Cannot uninstall prism due to error message with code 1001.
Cause: An antivirus may have corrupted the install folder or a required file (such as prismService_x_x_x_x.exe) was deleted. This corrupts the installations due to the installation code being contained in the service.
Alternatively, the registry may have been corrupted, which can produce all kinds of weird errors. E.g.
Solution for Windows 7 and above
Microsoft provides a tool for fixing these uninstall problems:
https://support.microsoft.com/en-gb/mats/program_install_and_uninstall
Solution for earlier Windows versions
For earlier versions of Windows you can download the old MsiZap software from a third party website. The tool was originally developed by Microsoft but was discontinued due to conflicts with some of their newer products. This should still work on older machines:
https://www.techspot.com/downloads/388-windows-installer-cleanup-utility.html
After install the tool downloaded from the above link, follow these steps:
- Navigate to the install location, which should be something like C:\Program Files\Windows Installer Clean Up
- Run msciuu.exe
- Select prism from the list and select remove. Be careful not to remove anything else
- If you get an error message, try removing it again. You could also try rebooting the computer afterwards. After this it should be fixed, and prism should be removed.
Symptom: Uninstaller silently fails and rolls back, meaning that after you select uninstall it is still installed afterwards.
Solution: Try the same tools as the previous solution.