How to detect old installation and offer removal?
32775
Inno Setup: How to automatically uninstall previous installed version?
146571
How to detect the edition of SharePoint 2010 installed?
101714
Is there any way to roll back the most recent upgrade?
68366
Checking installed packages
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
5162
How to fake a package version installed?
5617
How to delete old packages installed by pacman in Arch Linux?
133256
Permanently indicate to Market an application should refuse upgrades?
106396
How do I detect and remove Python packages installed via pip?
72870
Inno Setup uninstaller VersionInfo
114175
How do I test if another installation is already in progress?
54696
Using apt-get how to check have installed latest version ?
117441
How can I install and remove programs in one command line, and confirm only once?
6440
Can I see why a package is installed?
21300
Is it safe to use the command apt-get autoremove in this particular scenario?
118831
How do I un-install / remove a click package
134192
How to make sure I'm not using any proprietary software after installation?