I'm feeling generous (and cold) today, so here's a free seasonal Windows 7 theme pack. It's a collection of eight photos taken at Runnymede in Surrey (where Magna Carta was signed) from last winter, when there was an exceptionally beautiful hoar frost on the 23rd December. Enjoy, and feel free to share the link (it's a 14MB download). All the photos were taken by me on my trusty little Fujifilm Finepix S5700.
To install the Theme Pack, just double-click on the downloaded file (Wonder Winterland.themepack).