I have owned my 4 gigabyte zune for like 2 to 3 years and it has been a really good MP3 player. After I updated my Zune, I have been able to buy songs from the marketplace and maybe 3 months later, I look for a song and it just says error. I get off Wi-Fi, and it lags like shit. I have to let it sit for like 3 days until it goes at normal speed. Please help!