plz help ... huge problem when upgrading to windows 7

Well, lets hope they replace it for you. Thats what the warranty is for after all.

Not always, but it can be either software or hardware problems that cause BSOD (Blue Screen of Death).

I think in your case it is. If you still get them after getting a new HDD then head over to the crashing and debugging part of the site. They will get you sorted.

You should have already used the Fujitsu diagnostics, which is what I thought you already did to get the error code. If you get the error code you mentioned earlier, there is a problem. The person from Dell didn't even look up the error code (to my knowledge). He immediately told me it would need replacing.

Personally, I like Seagate drives at the moment, but most people are recommending Western Digital these days. Most other brands seem to have higher failure rates.

What you downloaded was from the official Toshiba web site. A couple years ago Toshiba bought the hard drive devision of Fujitsu, so now all of the technical support and warranty claims go to them. You can read more about it online at various sources.

There is no other official test available, nor will there ever be.