The specified directory for the INSTALLSHAREDDIR parameter is not valid

Error on installation of SQL Express

The specified directory, “C:\Program Files\Microsoft SQL Server\”, for the INSTALLSHAREDDIR parameter is not valid because this directory is compressed or is in a compressed directory. Specify a directory that is not compressed.

Solution

1. On the desired folder (in this case “C:\Program Files”) right click and go to Properties.
2. Click on Advanced button.
3. Uncheck the box Compress the drive to save space
4. Click Apply and then Ok.
5. Let the process finish.