External HDD Detection / Driver installation problem in Vista

Hi,

I recently bought a WESTERN DIGITAL External HardDisk.

I have Three Desktops Two running Windows vista, One running Windows XP and One Laptop Running windows XP.

Desktop 1 SPECS

AMD ATHLON XP 2600+, 1 GB DDR 400 RAM, 80 GB SATA SEAGATE + 160 GB SATA SEAGATE, nVidia Geforce 5200FX, NVIDIA NFORCE 2 BOARD, OS : WINDOWS VISTA ULTIMATE

DESKTOP 2 SPECS

AMD ATHLON X2 5600+ (DUAL CORE), 2GB DDR2 800 RAM, 320 GB WESTERN DIGITAL SATA HDD, AMD 690G BOARD. OS: WINDOWS VISTA

DESKTOP 3 SPECS

AMD ATHLON 3000+ , 1 GB DDR 333 RAM, 80 GB SEAGATE, SYSTEM MANIFACTURER: HP, OS : WINDOWS XP

LAPTOP 1 SPECS

INTEL CENTRINO 1.7 GHZ (SINGLE CORE), 512 MB RAM, LAPTOP MANIFACTURER : COMPAQ, OS : WINDOWS XP.

i also have 3 external HDD. 1. SAMSUNG 2. SEAGATE 3. WESTERN DIGITAL.

In DESKTOP 1, With Seagate HDD inside on SATA interface, when plugged in Western Digital Detects n Installs the Driver Automatically , but when plugged in Seagate external HDD it does not detect at all.

Now the Desktop 2, with Western Digital Harddisk inside , when plugged in External HardDisk of Same Brand (Western Digital) , detects the hardware , and does not install the driver.


in Desktop 3 : NO PROBLEM IN HARDWARE N DRIVER INSTALLATION

IN LAPTOP 1 : NO PROBLEM IN HARDWARE N DRIVER INSTALLATION.

THE SAMSUNG DRIVE IS DETECTED IN ALL THE SYSTEM.

Thus, from this i can identify that Windows Vista has some problem in identifying the external HDD (USD HDD) when is of same brand as of Internal HDD.

If this is true. Then what is the solution ?

If this is not True ? Then why is the other drivers are installed without a problem while Vista does not install. XP Does it perfectly well..



I tried using same machine and installed Windows XP on VMWare.

I tried to use the USB. It just detected n works inside VMWARE XP on Same Machine.

Attached ARe the Screnshots.

1. Under Vista



2. Same Machine , XP on VMWare



3. Different Machine with Seagate Internal HDD.


thanks.