How to install MuseScore on Windows without administrator rights
If you want to use MuseScore on a Windows computer and don't have administrator rights, use the portable version. It requires no installation and can be run from a memory stick or hard disk drive.
Download MuseScore portable: MuseScorePortable
Double-click on the file to begin the unpacking process.
Once finished, go to the folder where you unpacked MuseScore to and double-click MuseScorePortable.exe