The installation process requires space on the system drive C.

Even if you are installing on the other drive than the system drive C, to avoid an "out of drive space" error during the installation process, you should have approximately 190MB of space available on the system drive before installing (you may need to clear this space on C if it is not available).

The Windows installation process unpacks its .msi installation file and other temporary and log files to a location on the system drive (typically C), regardless of which drive you choose for the installation, and regardless of the drive indicated by the TEMP and TMP environment variables.

When the installation process completes the installation, it frees the space it consumed.

The .msi file, and other temporary and log files written by the installation process temporarily add a total of approximately 190MB to the C drive. If the system drive does not have this much free space, the installation fails with a "There is not enough space on the disk" error.