by mystake,while I was under Linux,I've started to delete the Windows installation files located on the NTFS partition. I've issued these commands :
mount -t auto /dev/sda1 /mnt/sda1
rm -r -f Windows
but not the whole Windows folder has been deleted,because I stopped after some time. Anyway Windows now is unabled to boot. How can I recover the deleted files under the Windows folder ? Thanks.