this might sound a little complicated. exit out of steam. then go into your computer, c drive (or whatever your harddrive is named with steam), then open program files, steam, once in the steam folder you should see 2 files that are .blob files. both of these can be deleted with out any kind of effect except fixing 90% of all steam problems. just delete them both. then start steam back up. you should have to do an update then everything should work fine for you. if this doesnt make sense to you add me to your xfire thesnake2121. ill walk you through it.