They may be just about the most primitive form of computer animation there is, but animated GIFs can still be fun, and genuinely useful, so it’s a shame they’re not more widely supported on the PC. Most programs will just display the opening frame, at best, leaving you to guess at everything else.
There are ways around this, to some extent. Right-click a GIF in Explorer, for instance, select Open With > Internet Explorer, and a browser window will open and play the animation. This is a long way from being convenient, though, so if you’d like easier playback – and a lot more besides – then you’re sure to prefer 7GIF.