| Versions | Hits | Percent | ||
|---|---|---|---|---|
| Windows | 71399109 | 79.7 % | ||
 | Windows XP | 30048371 | 33.5 % |  |
 | Windows Vista | 312 | 0 % | |
 | Windows (unknown version) | 10628 | 0 % | |
 | Windows NT | 25376 | 0 % | |
 | Windows ME | 4316 | 0 % | |
 | Windows Vista (LongHorn) | 13976561 | 15.6 % | |
 | Windows Mobile | 1727 | 0 % | |
 | Windows 98 | 11331 | 0 % | |
 | Windows 95 | 737 | 0 % | |
 | Windows 2008 | 26715681 | 29.8 % | |
 | Windows 2003 | 287465 | 0.3 % | |
 | Windows 2000 | 316510 | 0.3 % | |
 | Windows 3.xx | 94 | 0 % | |
| BSD | 29143 | 0 % | ||
 | OpenBSD | 1795 | 0 % | |
 | NetBSD | 288 | 0 % | |
 | FreeBSD | 27060 | 0 % | |
| Linux | 8924720 | 9.9 % | ||
 | Ubuntu | 5268390 | 5.8 % | |
 | Suse | 447627 | 0.5 % | |
 | Red Hat | 19384 | 0 % | |
 | Mandriva (or Mandrake) | 131853 | 0.1 % | |
 | Gentoo | 50775 | 0 % | |
 | Fedora | 285182 | 0.3 % | |
 | Debian | 128507 | 0.1 % | |
 | Centos | 27131 | 0 % | |
 | GNU Linux (Unknown or unspecified distribution) | 2565871 | 2.8 % | |
| Macintosh | 8384066 | 9.3 % | ||
 | Mac OS X | 8383575 | 9.3 % | |
 | Mac OS | 491 | 0 % | |
| Others | 760523 | 0.8 % | ||
 | Unknown | 700666 | 0.7 % | |
 | Sun Solaris | 51930 | 0 % | |
 | OS/2 | 3783 | 0 % | |
 | Symbian OS | 2090 | 0 % | |
 | Unknown Unix system | 1106 | 0 % | |
 | Nintendo Wii | 432 | 0 % | |
 | CPM | 305 | 0 % | |
 | Sony PlayStation Portable | 112 | 0 % | |
 | Irix | 34 | 0 % | |
 | HP UX | 30 | 0 % | |
 | Aix | 17 | 0 % | |
 | RISC OS | 10 | 0 % | |
 | AmigaOS | 6 | 0 % | |
 | Dreamcast | 2 | 0 % | |