Computer crashing on videos s (has happened twice)

[Jjoe]

I've had two random crashes when watching videos (the computer just freezes completely and a buzzing sound is output). I've got no clue whatsoever on why this could be . Happened once a few minutes ago and once a few months ago, any help would greatly be appreciated. A forced shutdown is the only way to turn it off.

Here are two of my other threads that may be linked:
https://www.pcspecialist.co.uk/forums/showthread.php?25904-CPU-fan-screeching
https://www.pcspecialist.co.uk/foru...ezing-for-a-few-seconds-then-beeping-randomly

Also I've watched the videos again after with no freeze, the first time I only had one video open and the second I had two open (I regularly have a couple open at once though).

Case
COOLERMASTER HAF 912 PLUS MID TOWER GAMING CASE

Processor (CPU)
Intel® Core™i5 Quad Core Processor i5-3470 (3.2GHz) 6MB Cache

Motherboard
ASUS® P8Z77-V LX: USB 3.0, SATA 6GBs, ATI®CrossFireX

Memory (RAM)
8GB SAMSUNG DUAL-DDR3 1333MHz (2 X 4GB)

Graphics Card
2GB AMD RADEON™ HD7850 - DVI,HDMI,2 mDP - DX® 11, Eyefinity 3 Capable

Memory - 1st Hard Disk
500GB 3.5" SATA-III 6GB/s HDD 7200RPM 16MB CACHE

1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM

Memory Card Reader
INTERNAL 52 IN 1 CARD READER (XD, MS, CF, SD, etc) + 1 x USB 2.0 PORT

Power Supply
CORSAIR 650W ENTHUSIAST SERIES™ TX650 V2-80 PLUS® BRONZE (£69)

Processor Cooling
Super Quiet 22dBA Triple Copper Heatpipe Intel CPU Cooler (£19)

Sound Card
ONBOARD 6 CHANNEL (5.1) HIGH DEF AUDIO (AS STANDARD)

Network Facilities
10/100/1000 GIGABIT LAN PORT - AS STANDARD ON ALL PCs

USB Options
6 x USB 2.0 PORTS @ BACK PANEL (MIN 2 FRONT PORTS) AS STANDARD

Operating System
Genuine Windows 7 Home Premium 64 Bit w/SP1 - inc DVD & Licence (£79)

Office Software
FREE 60 Day Trial of Microsoft® Office® 2010 Professional Edition

Anti-Virus
BULLGUARD INTERNET SECURITY - FREE 90 DAY TRIAL

Warranty
3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour) (£5)

Delivery
STANDARD INSURED DELIVERY TO UK MAINLAND (MON-FRI)

Build Time
Standard Build - Approximately 8 to 10 working days

Theres my build.

 

[ubuysa]

I think reinstalling Windows and starting again with a known clean system is a must for you now. I'm not sure that's related to your fan problem but I think your current system is not 100% happy and your only option is a reinstall.

Backup all your user data first, also backup the Users\....\AppData\ folder (it's normally hidden) because there is lots of application specific data in there (Chrome bookmarks for example) which you might want back. And then do a complete reinstall.

Actually, if you take my advice in the other thread about installing Macrium Reflect Free I would do that BEFORE reinstalling and take an image of your existing Windows partition/drive first. This is because Macrium Reflect allows you to mount image files as virtual drives, so if you forget to back anything up you can pull if off the Macrium image afterwards by mounting the image as a virtual drive on your new system.