IDE hard drive not recognized

I just rebuilt an old system using Windows 7 Home Premium after using WinXP pro for many years. The primary hard drive is WDC 150 Mg and Win7 is installed and updated to current with SP1. I dropped a second WDC hard drive in, formatted and was going to use it for a 2nd backup unit. Both of these...

hey, i am trying to backup files and programs to an external hard drive. and a messages comes up saying "one of the USB devices attached to this pc has malfunctioned and windows does not recognize it. can anyone help? thanks

Well, my Windows 7 laptop has been dead for a while, but now I want to see if it can be fixed. The laptop no longer recognizes the hard drive. I checked in the BIOS settings, and it shows there being no hard drive whatsoever. I opened the laptop up and made sure nothing was broken; nothing was. I...

My Western Digital USB hard drive was recently connected to a MAC to transfer some files. When I connected it back to my windows PC, it does not recognize the drive. Help please!!!!

It will shows up in diskmgmt as unallocated space, but not in my computer. This was given to me from my brother, and he used a mac air book. Is there any way to access.