This is what I do on a daily work related trip...Dont always believe what you are seeing....
Do this first...
Enter Safemode while booting...
If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you'll need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer Find your files "pictures, documents whatever and copy some of them to a jumb drive.
Take that jump drive and plug it into another known good working Winows 7 PC. If you can open those files on this other PC, "than no encryption has taken place" If the above #3 is True, Copy all the files to the jump drive so you can copy and paste them after a complete wipe and reload of the screwed up PC...Sometimes it is faster and better to do a wipe and reload of the OS...Been down this road many many times. If #3 is not true, than just perform the complete wipe and reload