I am sorry if it turns out to be like that. Personally I think I wouldn't really risk to save my data to a disk that behaves as you have been describing, even if you get past those initial hurdles.
One other aspect to consider, is your time. Quite certainly, the whole episode has cost you more in time and effort than it would cost your friend to buy a new hard drive and the worst part of it is that it doesn't seem to have got your closer to a working solution.


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Regards Fred
. Instead of scratching your with all those boot manager and all, just use the recovery software which can help you to recover your data. There is one such software called Windows Partition Recovery Software, that can easily

