I use to install Linux Ubuntu from Windows on all the computers I use, (using a Windows file as a virtual hd) but running Ubuntu natively. I also have OSX on the same computer (a 24 screen iMac).
Recently I installed Ubuntu 13.04 from Windows 8. In a few days Ubuntu didn't started anymore and I started thinking that what a low quality level for a software, that seemed not robust enough. Then I tried to dig into this and see what were going on.
Finally I traced the Ubuntu boot and reached a point where Ubuntu were complaining about Windows that had corrupted the file system. To my surprise it was required a chkdsk /f from Windows, a total shutdown and then Ubuntu started again smoothly.
The funny thing is that I was thinking bad about Ubuntu, when it is Windows 8 the one that is constantly corrupting the files system. This has happened to me on four computers, so Windows 8 is not able to keep its harddisk in real healthy conditions...
Long live Linux
Now everytime that Ubuntu refuses to boot, I know that Windows filesystem is corrupted again. And its true because a chkdsk /f fixes it. But Windows never reported by itself to be corrupted on those cases... 
