PerfectIt requires Windows 2000, Windows XP, Windows Vista, Windows 7, Windows 8, or Windows 10. It works with MS Word 2000, MS Word 2002, MS Word 2003, MS Word 2007, MS Word 2010, MS Word 2013, and MS Word 2016.

If you're working with very large documents (more than 500 pages), then faster processors and more memory will make a significant difference to the speed with which PerfectIt gathers information.