My Book Essential not working with Windows 7

my company’s My Book Essential hard drive will not connect to my pc, which is running windows 7, but connects just fine to others Macs.  The hard drive shows up in the devices and printers window, as well as the “safely remove hardware window,” but does not appear in “my computer” and I am unable to access it. 

Windows cannot read Mac formatted drives without software assistance. The link below is to a $20 program which claims full-featured access to all kinds of Mac drives from Windows.

If Read Only is sufficient, you can try HFS Explorer, which is free.