No hardware or software will work or install if they didnt pay microsoft for a certificate and WHQL validation. The issue is with 64 bit versions of windows 7 and 8 and the WHQL certified drivers requirement. This is a Known Issue.

http://forums.logitech.com/t5/Headphones-Headsets-Microphones/H540-USB-headset-not-recognized-in-Windows-8-8-1-64-bit/td-p/1112671/page/2

Thank you.