Hi ResonanceCascad! What I did was: launch game... at main menu page click on the uPlay logo (above My Realm and Facebook logos)... this then took me to another 'screen' for uPlay... when at the uPlay menu click left to get onto the pic entitled Win (Rewards and Actions)... click onto Rewards... then the wallpaper option and agree to download file...
Think that's about it. Sorry if I've missed a stage out!?!
Thanks for the help, unfortunately it doesn't work at all for me. I have the steam version and clicking the UPlay button is just a fast way for me to quit the game. Nothing happens after the game quits. I have even been into the files and found the uPlay browser which also does nothing. Administrator rights do nothing.
The web based version has no download option and I don't trust the dodgy files being offered for download from strange little websites. Any other suggestions would be greatly appreciated.