| Versions | Hits | Percent | ||
|---|---|---|---|---|
| Windows | 26848443 | 78.8 % | ||
 | Windows XP | 9219072 | 27 % |  |
 | Windows Vista | 383 | 0 % | |
 | Windows (unknown version) | 9599 | 0 % | |
 | Windows NT | 53498 | 0.1 % | |
 | Windows ME | 962 | 0 % | |
 | Windows Vista (LongHorn) | 4255913 | 12.4 % | |
 | Windows Mobile | 545 | 0 % | |
 | Windows 98 | 3750 | 0 % | |
 | Windows 95 | 172 | 0 % | |
 | Windows 2008 | 13130901 | 38.5 % | |
 | Windows 2003 | 95208 | 0.2 % | |
 | Windows 2000 | 78425 | 0.2 % | |
 | Windows 3.xx | 15 | 0 % | |
| BSD | 8514 | 0 % | ||
 | OpenBSD | 593 | 0 % | |
 | NetBSD | 836 | 0 % | |
 | GNU/kFreeBSD | 35 | 0 % | |
 | FreeBSD | 7050 | 0 % | |
| Linux | 3278265 | 9.6 % | ||
 | Ubuntu | 857125 | 2.5 % | |
 | Suse | 48926 | 0.1 % | |
 | Red Hat | 11696 | 0 % | |
 | Mandriva (or Mandrake) | 26149 | 0 % | |
 | Gentoo | 5139 | 0 % | |
 | Fedora | 48606 | 0.1 % | |
 | Debian | 31890 | 0 % | |
 | Centos | 16879 | 0 % | |
 | GNU Linux (Unknown or unspecified distribution) | 2231855 | 6.5 % | |
| Macintosh | 3727689 | 10.9 % | ||
 | Mac OS X | 3727653 | 10.9 % | |
 | Mac OS | 36 | 0 % | |
| Others | 207539 | 0.6 % | ||
 | Unknown | 198208 | 0.5 % | |
 | Sun Solaris | 6384 | 0 % | |
 | Unknown Unix system | 1175 | 0 % | |
 | Symbian OS | 1062 | 0 % | |
 | Nintendo Wii | 304 | 0 % | |
 | OS/2 | 187 | 0 % | |
 | BeOS | 164 | 0 % | |
 | HP UX | 29 | 0 % | |
 | CPM | 14 | 0 % | |
 | Sony PlayStation Portable | 12 | 0 % | |