In some cases windows Recovery disks may help.
Here is the link for Windows 7 x86 edition :
http://www.forum.probz.net/index.php...vironment-iso/
Click the download button on the page and then burn the iso file to a Cd-r medium.
But if Windows 7 recovery cd is not of help ,in that case Live CD 's come to aid.
Here is the list of linux livecd's :
Linux | The LiveCD List
Booting via a livecd (free Linux distributions) needed files can be recovered and copied
to external mediums and system afterwards can be re-setup.
Linux livecd can be burned onto a dvd-r /cd-r disk or to an usb flash memory.USB is faster and better
of course.
Laptops like Toshiba have recovery partitions in many cases, and a special recovery
option is provided upon bootup.(F9 - F10 likewise..)
hope your problem gets solved.