"The remount command failed. Maybe there is another process accessing the filesystem currently"
I had that error too. That happened sometimes when I tried to mount my hard disk after I started my internet or internet browser. I fixed it by mounting my hard disk immediately after startup (before starting any program), and then saving my settings in the configuration archive.
The next time I started Knoppix the problem was solved and mounting was no problem anyway!

Failed to mount '/dev/hda1': Operation is not supported
Mount is denied because NTFS is unclean. Choose one of these actions:
...
This problem also appeared at my hard disk lately. I'm not sure how I solved it at that moment....probably it was shutting down Knoppix, booting Windows and starting Knoppix again.
But...that won't work for you, because your Windows crrrrashed.
Maybe you could try restarting Knoppix and then immediately mounting the disk after startup?