This post helps Fix Please wait until current program has finished uninstalling or being changed when installing/uninstalling an unwanted program on your Windows.
Workaround: save your work, reboot your system and try again. Method 1: You may run Microsoft's Fixit@ aka.ms/Program_Install_and_Uninstall and choose an item you want to rid of. Method 2: Run the below command: msiexec /regserver Method 3: registry hack. Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. Export current registry settings. Check the following registry key HKLM\Software\Microsoft\Windows\CurrentVersion\Installer\InProgress. Empty/Rename "PendingFileRenameOperations" Registry Key. Check the following registry key HKLM\System\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations.