My Computer has been freezing a lot lately, and with no apparent reason.
It freezes even if my usage is 3% CPU and 9% RAM.
I was using Windows 8 until I decided I'd try to move on to linux, so I I installed a so-called beginner friendly distro, which was Ubuntu 14.04 .. I've struggled with it for 2 months thinking that I'm just not used to linux and that I would find it naturally difficult the first few weeks, but I faced lots of problems that I didn't face the first time I really used linux (8 months ago).
It was really slow, and after some researching, I adopted the idea that Ubuntu 14.04 wasn't really that stable, so I decided I'd download a less resource-heavy distro, so I installed Arch Linux (which is what I'm using to type this now) with GNOME. I'm not having any of the problems I used to have in Ubuntu, except for this mostly annoying freeze that happens to be absolutely random ..
My Fan is working correctly, so it's not temperature, and my drivers are up-to-date (they're the same ones I used on Windows, which I had no problem at all with).
Note that: The Whole OS just freezes, and when I was once able to Alt+F2 (to get to the run-a-command dialog) and managed to type in a command (I was struggling with the keyboard to type) and hit Enter, I got the message: No enough memory .. ? Which is pretty unexpected because I'm using a minimal system (arch linux) with only one application running ..
###Edit: Here's my /etc/fstab file
#
# /etc/fstab: static file system information
#
# <file system> <dir> <type> <options> <dump> <pass>
# /dev/sda3
UUID=2268132b-7cfa-4c55-b773-467c4f691e83 / ext4 rw,relatime,data=ordered 0 1
/dev/disk/by-uuid/2236F90308C55145 /mnt/2236F90308C55145 auto nosuid,nodev,nofail,x-gvfs-show,user 0 0
/dev/disk/by-uuid/4FF142A03DACFA48 /mnt/4FF142A03DACFA48 auto nosuid,nodev,nofail,x-gvfs-show,user 0 0
###lsblk outputs ..
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
sda 8:0 0 298.1G 0 disk
├─sda1 8:1 0 69.9G 0 part /mnt/2236F90308C55145
├─sda2 8:2 0 59.2G 0 part /mnt/4FF142A03DACFA48
├─sda3 8:3 0 90.3G 0 part /
└─sda4 8:4 0 78.7G 0 part
sr0 11:0 1 1024M 0 rom
