In the grand scheme, registry keys just take up a few bytes. If the developer used registry keys to store your customizations, they might leave them there, so when you reinstall all of your customizations persist. In addition to that, some developers might choose to leave those keys in case you choose to reinstall the application. If you choose to reinstall the application later, those keys give the application information on when it was installed. Some applications have a trial period and after that period you might choose to remove the application. Left on purpose - As one comment mentioned, these entries could have been left on purpose. For instances, two applications from the same developer, that writes to the same keys. It could also be that there is more than one application that uses those keys. In addition to that, the uninstaller might not have/use the proper permissions to remove the registry entries. The following is a list of some the cases and reasons behind leaving registry entries:īad programming - The developer did not write the application uninstaller properly and the registry entries are left behind. There are many reasons this is the case, however it is not the fault of Microsoft or the Windows operating systems. In the setup of my companies program, I delete the per-machine stuff but don't touch the per-user stuff, not even of the user currently running the setup. The same also applies to files in the per-user directories. You uninstall the application on TS1, now all the settings for all users are gone on TS2 because you have roaming profiles. Say you have two terminal servers running one application. If you use roaming profiles, for example for terminal services, and then delete all settings on uninstall, you could really mess up and delete stuff that is actually still in use.Ī terminal server is basically one windows machine where multiple users log-in at the same time and use applications. (Windows is lazy and only loads the things it needs.)īut you shouldn't even try that one. What about the other users? It could try to enumerate all users, but their registry keys might not be loaded. (This happens if you started the uninstaller from a non admin account and then entered the credentials of an admin account - the setup is now running under that account, not the first one). If a program is installed per machine (which most are) and multiple users use it, what should the uninstaller do? It could safely remove the user settings of the current account, but the current account might not be your account. While keeping leftovers in LocalMachine is laziness, as pointed out by the other answers, it is not possible to clean the User part. Normally, the setup writes values into LocalMachine, and the running program ONLY writes into CurrentUser (actually, unless the setup messes with the permissions, the running program can't write into LocalMachine.) Windows Add/ Remove Programs offers users a way to uninstall the program and every Operating System has Add/ Remove Programs feature.The registry has multiple root nodes, but only two interesting ones: LocalMachine and CurrentUser. There are many methods to uninstall the program, please see below: Manually Uninstall DWGSee DWG Viewer 1.882 with Windows Add/ Remove Programs Those leftovers will slow down your computer and stuff your system with invalid files as well as result in many problems for your life, such as strange error popups and unable to install other programs. If some files and components of the program are still left in the system, that means the program is not completely removed and uninstalled. Completely Uninstall DWGSee DWG Viewer 1.882 from Computerĭo you want to uninstall DWGSee DWG Viewer 1.882 completely from the computer? Do you receive strange errors when uninstalling DWGSee DWG Viewer 1.882? Do you fail to install the updated version or other program after uninstalling DWGSee DWG Viewer 1.882? Many computer users can not completely uninstall the program for one reason or another.
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