i still have stuff in my inventory that will not, go away! Options

[sassinaxe]

things like the arrow of extrication after i've used it and re picked it up its stuck in my inventory along with the big hiest plan after corvus has returned to the anvil castle and the gray cowl instructions! also things like keys, the imbel family crypt key long after i've killed imbel and taken the springheel boots and stollen the elderscroll also the echo cave key after i'm the arch mage and have killed mannimarco and also the collosol black soul gem in the same instance all these things have been stuck in my inventory! the question is, have these things happened to anyone else if they have done these particular quests, are they meant to happen and if not do you recommend returning the game i got?

also the starting sequence of the emperors voice and video stall briefly then carry on then stall and carry on again until the end of the sequence and this also happens in the bethesda introduction! please help, what does this mean?

[sassinaxe]

the thing i'm really worrying about is if these things are meant to happen or not, if there happening to others and its a software glitch or its meant to happen and most importantly can i get rid of it by buying a new game? please help i'm just really unhappy that the game might be faulty because of the inventory thing and the video glitch thing!

please help and thanks for any replies given and for theb ones already given!