# Install/uninstall problems **URL:** https://resource.dopus.com/t/install-uninstall-problems/31665 **Category:** Help & Support **Created:** [February 22, 2019, 9:29am UTC](https://resource.dopus.com/t/install-uninstall-problems/31665 "2019-02-22T09:29:21Z") **Posts on this page:** 1 **Showing post:** 3
### Author: ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo) #### Post date: [February 22, 2019, 2:17pm UTC](https://resource.dopus.com/t/install-uninstall-problems/31665/3 "2019-02-22T14:17:50Z")
Sounds like something has messed up the InstallShield installer on your system. Did you use any kind of custom uninstaller tools, or registry cleaners or similar? We recommend against them. If you haven't rebooted yet, please do that first, as it can be required to unload some components that are already inside other processes. Here is how to remove the Explorer Replacement settings from the registry if the uninstaller is not working: > [@How to manually remove Explorer Replacement settings](https://resource.dopus.com/t/how-to-manually-remove-explorer-replacement-settings/3646): > > Turning off Explorer Replacement is usually done via one of two ways: If you want to keep Opus installed but don't want it to replace Explorer, go to Settings -\> Preferences / Launching Opus / Explorer Replacement and set it to Don't replace Explo… If you still have problems with the installer after that, try the suggestions here: > [@Problems installing Opus](https://resource.dopus.com/t/problems-installing-opus/11073): > > (This has been hidden as most of it only applied to older installers. We have since switched away from InstallShield.) This FAQ lists several solutions for dealing with common installation issues. See also: [Windows Compatibility Settings / Wrong D…](https://resource.dopus.com/t/windows-compatibility-settings-installer-says-xp-sp3-is-required-on-a-later-os-version/11352) Sometimes the error messages aren't always the same as in the guide but one of the solutions still works, so they're all worth a try. --- _[View the full topic](https://resource.dopus.com/t/install-uninstall-problems/31665)._