O.K. So this is what's going on. Sometimes when I go to sign in on PSN it gives me the error 80710B23. But sometimes, it signs in and my friends won't load(Maybe like 1-2 friends) Sometimes it loads most of them, then when I click my MW3 disc, I have to download the new update. But this is impossible because when I start downloading, I get the DNLA protocol error 7531.
PLEASE HELP! I restarted my router, and turned off my PS3.