After you connect your Andriod device to your computer, you find you can’t use the device and don’t see it on your computer. Then you go to Device Manager to check for the driver status. In Device Manager, you see a MTP USB device with a yellow exclamation mark under category “Portable Devices” (In some cases, Unknown Devices under Other Devices). When you try to update the driver via Windows Update, you get this error message: A service installation section in this INF is invalid. You have no idea how to fix this problem. That’s why you come to this post, right? Don’t worry. You can fix the problem easily with one of the solutions here.
The problem occurs probably due to missing or corrupted USB driver files. Windows has built-in USB drivers, which allows you to connect USB devices to your PC without installing the drivers manually. But if the drivers are missing or having problems, after connecting the USB devices to your computer, you can’t use it directly. In this case, you need to install the drivers manually. There are different reasons causing driver files missing or corrupted. You’re likely to get this error especially if you’re using streamlined system or upgraded the system to Windows 10.
Since you can’t update the driver via Windows Update, you can use Driver Easy to update the driver automatically.
Driver Easy will automatically recognize your system, detect any problem drivers and find the correct drivers for you. You don’t need to know exactly what system your computer is running, you don’t need to risk downloading and installing the wrong driver, and you don’t need to worry about making a mistake when installing.
You can update your drivers automatically with either the FREE or the Pro version of Driver Easy. But with the Pro version it takes just 2 clicks (and you get full support and a 30-day money back guarantee):
1) Download and install Driver Easy.
2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.
3) Click the Update button next to a flagged MTP USB driver to automatically download and install the correct version of this driver (you can do this with the FREE version).
Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system (this requires the Pro version – you’ll be prompted to upgrade when you click Update All).
After updating the driver, reconnect your Andriod device and check to see if the problem is resolved.
To fix the problem, you can try to update the driver manually by selecting the MTP USB device. Follow steps below:
1) Right-click the MTP USB device.
2) Click Update Driver Software (In some cases, this could be “Update Drivers”).
3) Select Browser my computer for driver software.
4) Select Let me pick from a list of available drivers on my computer and click Next.
5) In Device Manager, if you see the device shown as MTP USB device. You’ll see MTP USB Device listed in the list. Highlight it then click Next.
If you see the device shown as Unknown Device. You’ll see Andriod phone or Andriod device in the long list. Highlight it and click Next then select MTP USB device.
6) The driver will install automatically. You just need to wait for a while until the installation completes.
7) Reconnect your Andriod device to computer and check to see if the problem is resolved.
If the built-in USB driver fiels mdmcpq.inf and usbser.sys are missing or corrupted, the problem could occur. So to fix the problem, you can try to install these two driver files. You can replace them with the same files on another computer. Follow steps below：
1) On the computer with no such problem (The computer can run any Windows version), locate file mdmcpq.inf in C:\Windows\INF. Copy and save this file to an external drive.
2) On the same computer, locate file usbser.sys in C:\Windows\System32\drivers. Copy and save this file to an external drive.
3) Connect the external drive to the computer with this problem. Copy file mdmcpq.inf to C:\Windows\INF and copy file usbser.sys to C:\Windows\System32\drivers.
4) Reconnect your Andriod device and check to see if the problem is resolved.
Hope the solutions above help you fix the “A Service Installation Section in this INF is Invalid” error.
If you solve the problem with the solution that we don’t mention in this post, please feel free to share it with us. We would keep updating the article.
If you have any ideas or questions, please also leave your comment. We’d love to hear of any ideas or questions.