I'm currently running Mint 14 xfce on my netbook with LibreOffice 184.108.40.206. It's happened quite a couple of times already that when I leave the LibreOffice Calc window open my system freezes. None of the keys on the keyboard (and mouse) work so to reboot I switch the netbook off and on. When it freezes the brightness meter appears on the top right corner of the screen.
I've been reading through the threads on here and saw that the problem occurs with Mint 13/14 Cinnamon and Mint 13 MATE. So, take note that it also occurs with the XFCE desktop.
Furthermore, I cannot load another Linux distribution nor desktop (and most probably not another kernel) since my hard drive already has 4 partitions. We had to remove the Windows recovery partition and make a logical partition of the C-drive just to have Mint XFCE installed.
So, any advice will be much appreciated.
(BTW, I'm a total noob.)