How do I determine cause of computer Freeze?

CountryBumkin

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My wife's computer is just a few days old. It's a home built machine on an Asus P8H61 mb, with intel i3-2100, 4MB of Corsair ram, and a new 120GB SSD. I have Win 8.1 x64, Office 2013, and Malwarebytes installed (and a few other apple phone support products) - that's about it.

It ran fine all weekend, this morning it was "frozen". None of the apps would open. I could cntrl+Alt+del and get to Task Manger but it would not open.

Oddly, I could switch Users to my account (admin) and access all of the apps, everything worked, resource manger, event viewer, etc. Under Admin account CPU, Memory, Disk activity were normal (0 - 4%).

So it was just wife's account (standard user) that was frozen. I rebooted, ran DISM and SFC and nothing wrong was reported.

How can I determine why it froze? If it happens again, what do I look for?
 

My Computer

System One

  • OS
    Win8.1
    Computer type
    PC/Desktop
    System Manufacturer/Model
    HTPC: Custom built
    CPU
    intel i5-2400
    Motherboard
    Gigabyte GA-Z68MX-DS2H
    Memory
    16GB Corsair DDR3-1600
    Graphics Card(s)
    on-board HD3000
    Sound Card
    On-board
    Monitor(s) Displays
    Samsung 32" LED
    Hard Drives
    eight HGTS Deskstar NAS, 3TB
    seven WD Red NAS, 3TB
    one Seagate ES.2, 1TB
    one 64GB SSD
    PSU
    Corsair 750W
    Case
    Li-Lian case with SuperMicro hotswap backplane
    Cooling
    Case 4 6" fans, stock CPU cooler
    Other Info
    Two 3-Ware (LSI) model 9650SE-8LPML RAID cards.
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