The Windows partition (%1!c!:) meets the minimum requirements for free disk space, but for best results we recommend at least ...

The Windows partition (%1!c!:) meets the minimum requirements for free disk space, but for best results we recommend at least %2!u! gigabytes (GB) of free disk space before installing. Installing Windows with minimal disk space available can reduce performance. Try using Disk Cleanup, uninstalling old programs, or moving files to another location such as a CD, DVD, or external hard drive.