I have my friends computer which was infected with the cryptolocker virus.
If I start it in normal mode, I get the big popup that locks me out of the PC.
If I start it in safe mode, I can access most of the files with no problem, but none of the malware / spyware / virus detection software sees anything wrong.
It also seems as though the program is only partway through the encryption as most of the files are not yet encrypted.
I sent a few of the encryption files to FireEye, but they come back as not being encrypted.