Zorin Lite 12.3 unstable on my PC

Hello, I has been now five times in different days that Zorin Lite 12.3 gets stucked without response... At first i thouth that was an external problem today I decided to tell you about this.

this is my computer (desktop)

Code:

$ inxi -FnZ
System:   Kernel: 4.13.0-38-generic x86_64 (64 bit)
           Desktop: Xfce 4.12.3 Distro: Zorin 12 xenial
Machine:   Mobo: MICRO-STAR model: G31TM-P21 (MS-7529) v: 1.0
           Bios: American Megatrends v: V4.7 date: 07/28/2010
CPU:       Dual core Pentium E5300 (-MCP-) cache: 2048 KB
           clock speeds: max: 2603 MHz 1: 1204 MHz 2: 1321 MHz
Graphics:  Card: Intel 82G33/G31 Express Integrated Graphics Controller
           Display Server: X.Org 1.19.5 drivers: intel (unloaded: fbdev,vesa)
           Resolution: 1360x768@60.02hz
           GLX Renderer: Mesa DRI Intel G33 GLX Version: 1.4 Mesa 17.2.8
Audio:     Card-1 Intel NM10/ICH7 Family High Definition Audio Controller
           driver: snd_hda_intel
           Card-2 VIA VT1720/24 [Envy24PT/HT] PCI Multi-Channel Audio Controller
           driver: snd_ice1724
           Sound: Advanced Linux Sound Architecture v: k4.13.0-38-generic
Network:   Card: Realtek RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller
           driver: r8169
           IF: enp2s0 state: down mac: 00:24:21:dd:c0:d7
Drives:    HDD Total Size: 610.2GB (47.3% used)
           ID-1: /dev/sda model: WDC_WD400BB size: 40.0GB
           ID-2: /dev/sdb model: SAMSUNG_HD322HJ size: 320.1GB
           ID-3: USB /dev/sdc model: 2500BMV_External size: 250.1GB
Partition: ID-1: / size: 29G used: 7.9G (30%) fs: ext4 dev: /dev/sdb1
           ID-2: /home size: 262G used: 89G (36%) fs: ext4 dev: /dev/sdb5
           ID-3: swap-1 size: 4.10GB used: 0.00GB (0%) fs: swap dev: /dev/sdb6
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 53.0C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 187 Uptime: 3:08 Memory: 1532.3/3936.0MB
           Client: Shell (bash) inxi: 2.2.35
~$ inxi -P
Partition: ID-1: / size: 29G used: 7.9G (30%) fs: ext4 dev: /dev/sdb1
           ID-2: /home size: 262G used: 89G (36%) fs: ext4 dev: /dev/sdb5
           ID-3: swap-1 size: 4.10GB used: 0.00GB (0%) fs: swap dev: /dev/sdb6



I have notice that the Stability gets lost when I open web browsers such as mozilla or chromium . I managged to overcome this "frozening" by pressing alt+ F2 (altough I cannot log in in the console) Also by pressing Alt + F7. Only by pressing F7 alone I got the system back. Would it be a lack of memory? i have 4 GB

Your memory is sufficient but I have had bad experience of MSI motherboard with WinXP regarding USB ports. You did not install the unstable microcode for Intel processors for Meltdown did you?

You did not install the unstable microcode for Intel processors for Meltdown did you?

I don't recall. How do I check that?
In the box from "additional drivers" I don't see anything available.

Ps: I also experience this when opening the menu in the browser

You did not install the unstable microcode for Intel processors for Meltdown did you?

I don't recall. How do I check that?
In the box from "additional drivers" I don't see anything available.

Ps: I also experience this when opening the menu in the browser

I was thinking of this thread when I posted:

viewtopic.php?f=5&t=12526&hilit=+microcode

but that relates to Core!