iTunes isn't supported with win8 yet. I suppose you could give feedback to Apple on it, anyway.
itunes menu > help> provide itunes feedback
You'd probably get farther asking on a win8 support board. Everyone there would presumably have win8, unlike here on Apple Discussions it will take a while for other win8 users to come along.
think I figured it out
I also had problems syncing my iPhone 4s
both have the last software/firmware from apple.
but I noticed if I unplug some of my USB devices
it works fine
so I just unplug them then re-plug them in.
I have 3 USB inputs usually all 3 have kings plugged in
one is my external hdd
one is wireless USB modem
and the last one is my iPhone.
they only promblem I'm having with windows 8 and iTunes is this and sync my iPhone.
sometimes it syncs and sometimes it doesn't.
never had this problem with windows 7 or my computer/hardware before.....
try this out and let me know.
also you guys havin sync issues with windows 8?
seems to be a very common problem with windows 8 from a google search..
I had the same issues with Windows 8 Consumer Preview. I installed on a fresh system and still had issues.
I experienced extreme lag, with pretty much everything, and iTunes freezing once I attempted to change the currently playing song.
I had a mess with compatibility mode and found out that running it in with Compatibility mode enabled for Windows XP (Service Pack 3) and as an administrator fixed it. It works now, however, there is a popup message that comes up on launch telling you to change the compatibility settings, but pressing "OK" makes it go away.
- Open Windows Explorer, and navigate to: "C:\Program Files\iTunes" (For 32bit) or "C:\Program Files (x86)\iTunes" (For 64bit), unless you changed it.
- Right-click on "iTunes.exe", select "Properties" from the context menu, and click the "Compatibility" tab.
- Under "Compatibility mode" check off "Run this program in compatibility mode for:" and select "Windows XP (Service Pack 3)" from the drop down menu.
- Further down under "Privilege level" check off "Run this program as an administrator".
- Click "Apply" and "OK".
Should fix any issues, I have my default iTunes Media Folder Location within an external hard drive so unplugging all of my USB's wasn't an option.
Hope I helped!
The above answer is not the fix, or at least not the fix on my system. After thinking about it and looking at what is happening it was obviosu the problem is with the audio drivers. REaltek Ausiod drivers have been hard to find and keep updated for years now.
This is the only place I have found the actual new updated windows 8 drivers:
Even if compatabilty mode fixes the issue for you, I belleive the real culprit and real fix is to update your drivers.