According to my experience I tried it was seems to be grate at beginning…but then I initially I found difficult to use my online banking website….which I use so often. There fore had to remain switching to i.e. just to use it. so I went back to firefox 3.6.
Well I guess the partition of old “hdd” could have been dented. Make an effort to recover the divider first or if that does not work, recover the files with Test disk. Hope this might helps you a lot.