External hard drive USB, not received a drive letter in Vista 64-Bit

I do not use my BeyondMicro 160 G external hard drive a lot just to make occasional backups, well this time was different.  I have powered the drive, plugged the USB cable into my PC and normal tone was heard, but NO drive letter is assigned to the drive.  In fact I couldn't find anywhere in my computer that the unit was even detected.  I Visa Ultimate 64-bit, I tried to uninstall the drivers in the Device Manager and rebooted and still no external drive, any suggestions?

Konala Hello,

Thank you for your response.

If the external hard drive not detected below are some steps to solve the problem:
 
You can check if the device is compatible with Windows Vista by visiting the Windows Vista Compatibility Center, which includes a list of drivers, hardware and applications that are compatible with Windows Vista.
 
For reference, the link to the Windows Vista Compatibility Center is included below:
 
Then, if the external hard drive is not detected in Device Manager, please check if the external drive is detected in the management of the computer:
 
You can check this by going to: start then click on computer
When it is connected and switched on, the drive should appear as a drive letter on the computer (ie: drive E:, F: or another letter.) An Autorun window may also appear if the drive is detected.
 
If the external drive does not appear, please check the following:

· Check the power supply and check if it works normally.
· Check the wiring and check that the USB cable is plugged into a port. You can also try another USB port.
· Check disk management to see if the drive is detected it:
 
1. right click on computer, select manage, select disk management.
2. check the upper and lower windows to find if the drive is detected.
 
If the external hard drive is not detected, try to connect the external drive to another PC to check if the unit is working normally.
 
Then please check if Windows Vista Service Pack 1 is installed currently.  If WVSP1 is not installed, you can try to install this service pack and check if the problem still persists.
 
For reference, the link below contains information. about how to obtain the latest Windows Vista service pack:
 
 
The relay please status after the above steps so that we will offer any additional assistance.

Engineer James Microsoft Support answers visit our Microsoft answers feedback Forum and let us know what you think.

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