Managing disks in Windows 7 does not recognize external hard drive

It is a recent event. I backed up my computer only 45 days ago and it worked Ok. The same external drive has no problems with your Windows XP desktop.

No other USB devices is facing this problem.

Device Manager identifies the mass storage device (WD1140), as well as the USB controller.

This utility cannot sort.
It is not possible to change/assignment of a new letter to the reader as disk management does not identify her. I also tried to use the command-line (list disk)... the only disc that displayed is internal.

I tried to change the USB port, without result.
The operating system is Windows 7 Starter.


Hello Cristian,

I appreciate the efforts to solve the problem. We would like to know the following information form you for help to come.

(1) what store did you run to fix the problem?

(2) you have any software from third-party security installed on your computer?

(3) what is the brand and model of your computer?

You could address this issue due to a hardware conflict or if the external hard drive that you are trying to connect has virus. Prior to the resolution problems make sure that you have installed all Windows updates. Follow the steps below to solve the problem.

Method 1: Run hardware and troubleshooting utility device.


Connect the external hard drive to your computer, and then run the troubleshooter below.

Open the hardware and devices troubleshooter.

Method 2: Reinstall the USB controllers.

You mentioned that another that this device, all other devices are detected, follow the steps to make sure that you have the latest USB drivers. This method addresses the steps where the USB driver currently loaded became unstable or corrupted.

(a) click Start, type device in the area Manager Search , then click on the peripheral Manager.

(b) expand Bus USB controllers. Right click on a device, and then click Uninstall. Repeat for each device.

(c) when completed, restart your computer. Your USB controllers will automatically install.

Method 3: Run Microsoft Safety Scanner.

I also suggest that you scan your computer with the Microsoft Security Scanner, which would help us to get rid of viruses, spyware and other malicious software.

The Microsoft Security Scanner is a downloadable security tool for free which allows analysis at the application and helps remove viruses, spyware and other malware. It works with your current antivirus software.

Note: the Microsoft Safety Scanner expires 10 days after being downloaded. To restart a scan with the latest definitions of anti-malware, download and run the Microsoft Safety Scanner again.

Important: the data files that are infected must be cleaned only by removing the file completely, which means there is a risk of data loss.

Write to us at the State of the question. If you need additional assistance, we will be happy to help you.

Tags: Windows

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