Split "installation" into "OS-installation" and "software-installation"
I would like to recommend splitting the "installation" tag into one for "OS-installation" and "software-installation". Although both are installation processes, the challenges associated with them are very distinct, which I believe justifies the new tags.
The impact can be kept minimal by simply renaming "installation" to "OS-installation" since the only question thus tagged is about OS installation.
I have created the new tag "software-installation" when submitting an edit suggestion to this question but would of course withdraw that if the community decides against.