Q: iphone 5 and lenovo computer icloud syncing not working since downloading new ios

Hi Prince211,

If you are having issue backing up to iCloud, you may find the following article helpful:

iCloud: Troubleshooting creating an iCloud backup

http://support.apple.com/kb/TS3992

If you mean that you are having issues wirelessly syncing your iPhone on the same WiFi network as your computer, you may find this article more helpful:

iTunes 10.5 and later: Troubleshooting iTunes Wi-Fi Syncing

http://support.apple.com/kb/TS4062

Regards,

- Brenden