Hi,
Thank you for posting your query on Microsoft Community.
As per the description, I understand that your USB keeps disconnecting.
This might have occurred due to hardware conflicts.
Try the Methods.
Method 1:
Run the Hardware Devices troubleshooter.
An automated troubleshooter is a tool that can find and automatically fix some problems with your computer. These troubleshooters aren't designed to fix every problem, but they're a useful tool to
try because they can often save your time and effort.
a) Press “Windows Logo” + “W” keys from the keyboard.
b) Type “Troubleshooting” in the search bar and press “Enter”.
c) In the “Troubleshooting” window, click on “View All” on the left pane.
d) Click on
“Hardware and Devices"
f) Click “Next” and follow the on-screen instructions to complete the troubleshooting process.
Method 2:
Run the System File Checker tool (SFC.exe)
System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. It will scan your system
files and to repair missing or corrupted system files in Windows. To run the SFC scan, refer to the Microsoft article below.
http://support.microsoft.com/kb/929833
You may refer:
What if a device isn't installed properly?
http://windows.microsoft.com/en-us/windows-8/what-device-isnt-installed-properly
Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.