|If the above link doesn't help you then:|
Try booting into Windows Safe Mode by tapping F8 at start up. If you are prompted for a password try hitting enter. If that gets you into safe mode you can then copy your files over to another location.
If the above doesn't work then:
You can use a Live version of Linux to boot from a flash drive and then copy your personal files to a CDR/DVDR, external drive, etc.
You may need to take ownership of the files/folders at some point. Click on the first link below to learn how to do that.
To create a Live version of Linux:
Click on the link below and follow the instructions to download both Lucid Puppy and Universal USB installer. Follow the prompts to create a bootable flash drive with lupu on it. Very small version of around 130MB size.
This version will not disturb any files on your computer. You perform the operations on another computer and then set the boot order to boot from a USB flash drive before the hard drive on the computer with the problem.