I point out this post from Robert McLaws not so much because I've heard of the problem it's fixing, but as a note that the next time someone complains that "well, in Linux if you have to fix something you end up having to type cryptic commands into a scary black window", point them to it and contemplate on
icacls favorites /setintegritylevel (OI)(CI)low
Suddenly "apt-get dist-upgrade" or "umount /dev/hdd" doesn't seem so bad :)