Hi all, hope this is in the correct forum but mods please feel free to move if not.

I've just been given a new Lenovo Yoga 2 by my work and it's running Windows 8.1 Pro.

However, I've lost work several times now as every time it goes to sleep, when it wakes up all of the apps have closed as if it shut down (the sleep light is blinking when it is asleep)! Is this normal for Windows 8 as I've never used it before and it certainly didn't do this in Windows 7?