Iphone 5s won't sync with itunes on windows 8 - i can see all the tunes in there, artwork etc but they won't play

Question

Hi
Hope one of you can help, thanks in advance.......
windows 8/iphone 5s/latest IOS
I've synced my iphone with my pc and backed up too and when i go into music on my iphone i can see all the tunes listed on there including album covers etc but when i go to play one of the tunes nothing happens or sometimes the phone goes kind of crazy and seems to scroll through every album (visually) on the phone and then stop?! still without playing any actual music?
In the apple store they told me to un-sync music and then re-sync which i did but this hasn't worked. although when i had un-synced and went into my phone to check whether music had been removed it was still there (but still didn't play as described above)
so really i want to know either 1) how to properly delete all the songs from the phone and then re-install them or 2) just get them to sync properly!
Other info - i transfered itunes to a new pc recently and up until just now, i couldn't play these tunes on itunes on my PC, they opened in some terrible microsoft thing - but i just changed the file associations inside windows and now they play great - just not on my phone as described above - maybe this has something to do with the problem?
Also, this only applies to music copied from cd-> itunes on pc 1 ->itunes on pc 2-> iphone.   songs purchased from itunes store work fine
Thanks for reading

Answer 1

"I was thinking I would just connect my iPhone and all of my music and other stuff would transfer to the new computer. "
Not true. The music and pic sync is one way - computer to iphone. The only exception is itunes purchases. Without syncing: File>Transfer Purchases
You really should transfer everything from the old computer, or your backup copy of your computer. Since you do not have access to the old computer, then use your backup copy of the old computer.
If for some reason you have failed to maintain a backup copy of your computer ( not good), then you would have to transfer itunes purchased as described earlier. Any other itunes content would be lost.
You can e-mail photo library pics to yourself, but they will not be of the original quality.
Before syncing, enter at least one unique contact and calendar entry on the computer. When you first sync, then you should get the option to merge the data.