Last updated on May 21st, 2017
Error 1001 While Uninstalling or Installing a program: Error 1001 may occur while trying to update, repair or uninstall a specific program in Windows OS. The problem is commonly caused because the previous installation of the program is damaged.
The error "1001" is commonly faced, because the previous installation of a program is corrupted or because the Windows installation is not in a normal state (e.g. the registry has been modified by a malware). In such cases, the user cannot uninstall, repair (reinstall) or upgrade a software on the system and receives the following error: "Error 1001. An exception occurred while uninstalling. This exception will be ignored and the uninstall will continue. However, the application might not be fully uninstalled after the uninstall is complete”.
This tutorial contains instructions to fix the Error 1001: An exception occurred while uninstalling or while installing a program in Windows 10,8, 7 & Vista
How to fix Error 1001 During Installation, Uninstall or Upgrade. (Windows 7, 8, 8.1 & 10)
1. Download Microsoft's Program Install and Uninstall FIX.
2. Run the downloaded file: "MicrosoftProgram_Install_and_Uninstall.meta".
3. Click Next at first screen.
4. At the next screen, select when the error 1001 occured: During Installing or Uninstalling a program? (e.g. Uninstalling)
5. From the list of programs, select the program that you want to install or uninstall and click Next.
6. Then select Yes, try uninstall.
7. At the last screen, verify that the Fix status says "Fixed". *
* Note: If the "Program Install and Uninstall troubleshooter" utility, cannot remove the program you want, then follow the instructions in this guide: FIX: "You do not have sufficient access to uninstall" problem.
8. Close the "Program Install and Uninstall troubleshooter" utility.
You 're done!
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