Product Information Installs on Windows 11 Windows 10 Windows 8.1 Windows 7  Can be installed on 5 Pc's  Microsoft Professional Plus 2007 DVD with Permanent License key no subscription, as shown.  This is a full version cd, any pre-existing Microsoft office software must be uninstalled before installing 2007. Two Microsoft office programs cannot run on the same pc. RETURN POLICY Software, CDs, DVDs and video games may be returned for a full refund if in the original, unopened packaging within 30 days of purchase. Opened software,CDs, DVDs and video games may be exchanged for the same item only if defective. Software returned opened used or unsealed,will be charged a 15-50% as we cannot resell the software as new.