how to watch movies purchased on itunes

please help me!

is 3 gig available memory enough to download/watch a movie purchased on itunes? i have itunes, icloud, imatch on ipad, iphone, windows xp pc, windows 7 pc laptop.

1. laptop itunes store keeps crashing. click on "find solution" also crashes. the movie i just purchased is not listed in the library.

2. icloud doesn't show purchased media.

3. iphone shows "not enough memory" error message when i try to download from itunes, even though it's got 3 gigs device memory, and 3 gigs in cloud.

4. ipad - ditto

5. pc - just downloading now. we'll see.

6. bluetooth keyboard issue, from march, temporarily solved. but now that i'm going on a writers vacation tomorrow, the keyboard stopped working again. i just bought a used pc laptop as backup. this *****, for two reasons. a. i bought into apple devices for lightweight travel. b. the newest laptops all ship with windows 8, which is a franken nightmare - so i'm on some used laptop that's got none of my programs, and all of someone else's finger prints & keyboard crud - just so i can dial into "go to my pc" which crawls between each keystroke. gaaaa!