There are many error messages you may confront with time to time in Windows computer. You may get these errors due to various improper activities. Sometimes when you try to map a network drive on your computer, you simply get Windows system error 85. The error is also scripted as System error 85 has occurred. The local device name is already in use. After the occurring of this error issue you cannot be able to map any drive without resolving this issue. You can go with some manual or automatic error fixing method to fix the issue. For automatic fixing of the error, you can use Advanced System Repair tool in the computer.