I had an MS Word 2007 file on my system. I had it opened for a couple days, and during this time, Windows decided to FORCE a restart of my system (beautiful idea to default to this behavior, btw), and while doing so completely lost (how?) my saved copy of the aforementioned file.
This file is...
advanced help
auto-restart
chkdsk
data loss
data recovery
diskdata
document lost
encryption
file recovery
file system
force restart
hdd repair
lost documents
ms word
recovery techniques
technical support
temporary files
troubleshooting
user data
windows 7