How to disable Symantec Device Manager and access your disabled USB drive

Well, its going to be interesting! Symantec might be installed on your office machine and its controlled by policy, so it might be blocking you from connecting any USB device. You can enable it at your own risk, provided your are a machine admin.

open services.msc and look for Symantec Management Client Service.
Go to properties.
Open the logon tab.
Give your current network credentials.
Now go to Task Manger and kill smc.exe.

Now on Symantec will be running in your account and you are the boss. You can Stop/Start/Kill it at any time.

If you dont want to see the service running again, dont give your right password in logon. Service wouldnt start now on, because of the logon failure.

Disclaimer: I am not using the above method, neither i am recommending this to you. You are on your own buddy!