Don't know your specific problem for why the fix wont work. but if you can get to command prompt and you have another disk drive, you can easily transfer data to it (that you can later access on a clean copy of windows)
Heres a list of necessary commands
dir (list all the files and folders in a directory)
cd .. (moves up 1 directory/folder)
cd "Directory name" (moves into the selected directory, to get directory names in the current folder, you can type 'dir', this command h as no quotation marks)
and the copy command: (which being more complicated warrants a link
https://technet.microsoft.com/en-us/library/bb490886.aspx?f=255&MSPPError=-2147217396