Windows 7: HP desktop randomly restarts

I have just bought a refurbished HP computer, and am experiencing random restarts, particularly when watching videos on youtube. The computer just suddenly goes black and turns off and back on again. I'm a complete novice at computers so I'm not 100% sure what's the issue here. I'm running windows 7 64bit home premium.

Any help would be greatly appreciated.

Here is the error message:


problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 2057



Additional information about the problem:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA8004D11038
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\070611-21340-01.dmp
C:\Users\Tariqur\AppData\Local\Temp\WER-42338-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

zipped files

any help at all?

i noticed that when ever i go on flash based websites, videos or games the desktop crashes. Ive managed to pin this down to google chrome. It some reason doesnt like flash based applications. So ive gone back to internet explorer 32bit verison, and everything seems to be fine now. no crashes so far!

hope this helps someone else! i spent all day trying to solve this with no replies! thanks anyways!

Hi,welcome to SF
The folder you have uploaded is empty.
Please follow this steps and upload the minidumps http://www.sevenforums.com/crashes-d...tructions.html
-----------------
In meantime,
Uninstall AVG and avg toolbar.
Uninstall Comodo.
Download and install MSE http://www.microsoft.com/security/pc-security/mse.aspx
Enable windows firewall.