Uninstall/Reinstall Zune Software
If you uninstall the Zune software you will not lose any music, pictures, etc. To uninstall Zune software:
Click Start and type msconfig in the Start Search box and press Enter. If you are prompted for an administrator password type the password and click Continue. Click the General tab and select Selective Startup. Under Selective Startup uncheck Load Startup Items. Click the Services tab and select Hide all Microsoft Services check box and click Disable All. Click Ok and restart your computer.
When your computer boot backs up, make sure your Zune device is not connected and click Start and type appwiz.cpl in the Start Search box and press Enter. In the Uninstall or change a program window click Zune, click Uninstall and click Yes. Uninstall the following software:
Microsoft User-Mode Driver Framework Feature Pack 1.0
Windows Driver Package – Microsoft WPD
Windows Media Format 11 SDK
Windows Portable Devices
Close out of the window by clicking the X in the corner. Click Start and Computer. Click the C: drive and click on the Program Files folder. Find the Zune folder, right click, and select Delete.
Next we will empty the Windows temporary folder. Click Start and type %temp% in the search box and click Ok. Click on Edit and click Select All. Click File and Delete. Answer yes to the confirmation: Are you sure you want to send these items to the Recycle Bin?
Now that the Zune software is uninstalled we need to reinstall it by downloading the current version. Make sure you are signed on as an Administrator.
Next you need to change back to the normal startup. To do this click Start and type Run in the search box. Type msconfig and click Ok. Click the General tab and click Normal Startup and Ok. Restart your computer.
When your computer comes back up open the Zune software, and reconnect your Zune via the USB cable.