Well, my usb is working fine, is just that FreeDOS app problem which I've read before, it had happened to a lot of people.
Sorry, but what you say is not prove of anything. You don't really say:
_how you know that your UFD is working fine;
_if you really tried correctly using "ubcd2usb" as I described;
_if you connected your UFD to a USB post DIRECTLY connected to your motherboard (PART
of the USB ports at the back of a desktop);
_if you tried building UBCD with "ubcd2usb" using another USB port (not paired with the previous USB port);
_if the UFD is FAT32;
_if you cleared/cleaned/format your UFD...
Together with people that failed, there are many others that were successful, including UFD bigger than 256MB (which you have mentioned as somehow "problematic" with FreeDOS, with no background, nor link, no basis).
All this doesn't mean that you are definitely wrong, nor correct. It just means that you haven't provided ANY relevant information for anyone to help you, besides the correct
steps to build your UFD that I already posted.
Meanwhile, I'm going to burn my cd correctly now, see how it works.
About the FJDT, I've looked everywhere, but I cannot find any tutorial nor information about it nor why is not detecting my HDD if all of the others apps could find it.
If you think that FJDT has some problem, you could download it and make a customized UBCD to try both versions, the already-included one and your downloaded one. But if you are not following the correct instructions to build your UFD or CD with UBCD, then logically no user would be able to help you.
be a limitation of FJDT with your specific HDD, which is a HDD for laptops, and almost all HDD manufacturers have specific tools and instructions for laptops' HDDs. Have you looked at http://sdd.toshiba.com/main.aspx?Path=ServicesSupport/WarrantySupport/SoftwareUtilities
for the compatibility of your specific HDD model (which we don't know)?
My laptop is already 2 years old, my HDD is the one that is 6 months old but it came just with 3 months warranty (which it sucks
This is clearly a problem, since the manufacturers (Toshiba in your case) give more than that AFAIK
, so, be careful where you buy, and demand what is expected for a NEW
.. so, in case I cannot diagnose my HDD, can I zero write it? I've read that new-HHDs just overwrite the damaged info and they can work.
This is almost
your HDD is working correctly (which you don't know according to the info you provided), you could "quick format" and reinstall (once again, if you have all the correct/original CDs and DVDs for your laptop and OS).
If your HDD is working correctly, and you "quick format" it, you don't need
to "zero-fill". But, I would strongly recommend both testing/repairing and "zero-filling" your Windows partition before reinstalling.
I would test the whole HDD, but I wouldn't "zero-fill" a so-called "recovery partition", if you have one.
If you can't get assistance from your warranty, my recommendation would be to try to at least evaluate your HDD before spending so much time reinstalling everything and "trusting" your luck.
BTW, being a laptop, you should test/work/evaluate/install with a correct power supply
plugged in all the time until you finish, not only with the laptop's battery.