Looks like Hamluis decided that your post to Alimoham's topic was indeed a hijack, so he split this topic off. (Thanks for the clarification Luis!)
I posted this on the other thread, but here it is again for you:
OK, lets see if we can figure this out. There are some folks around here with more elegant ways of doing this, but I'll take the long way around:
I happen to be running Vista Home Premium SP 2 right now, so can work through this with the right OS. Yesterday I was running a Linux system, so couldn't check my statements for accuracy.
The goal is to get you through this without reformatting or losing any data.
ASSUMING that when you plug your external hd in it comes up as the E: drive (pluggin my external USB drive in now...)
You can read the instructions by going to Start/Help and Support/search for 'Check your hard disk for errors' (without the quotes).
This process can take a while, and you don't want your laptop running out of power or going to sleep on you, so plug it in and make necessary adjustments to your power settings...
The instructions say (paraphrasing here):
Go to Start/Computer/right click on drive you want to check (E: in this instance)/Properties/tools tab/ first option is error checking, click the 'check now' button/ if you're not logged in as administrator User Account Control will pop up asking for password / 'Check Disk <your disk name> (E:)' window should pop up, you probably want to check both option boxes, then click the Start button.
Make sure it runs to completion, it might take a while (couple of hours).
Hopefully this will restore you external drive back to 'normal'.
If not, we'll have to call in some of the BC 'big guns' for assistance.
FunFilter, I've some additional comments and questions for you. Please see my next post.