Windows 7 Suddently strucked windows 7

[lanka]

Acctually im confuse with this thing.My notebook strucked several times and only thing i can do is switch off the my machine.

during this time following applications were running:
Virtualbox with linuxmint(with guest addition)
windows media player
chrome web browser etc..........


here details of my machine:

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System Information
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Machine name:
Operating System: Windows 7 Professional 32-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)
Language: English (Regional Setting: English)
System Manufacturer: Hewlett-Packard
System Model: Compaq Presario CQ45 Notebook PC
BIOS: Default System BIOS
Processor: Intel(R) Core(TM)2 Duo CPU T6400 @ 2.00GHz (2 CPUs), ~2.0GHz
Memory: 2048MB RAM
Available OS Memory: 1978MB RAM
Page File: 1154MB used, 2803MB available

DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 32bit Unicode

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Display Devices
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Card name: Mobile Intel(R) 4 Series Express Chipset Family
Manufacturer: Intel Corporation
Chip type: Mobile Intel(R) 4 Series Express Chipset Family
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_2A42&SUBSYS_30F7103C&REV_07
Display Memory: 797 MB
Dedicated Memory: 64 MB
Shared Memory: 733 MB
Current Mode: 1280 x 800 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: SEC4D42
Native Mode: 1280 x 800(p) (59.994Hz)
Output Type: Internal
Driver Name: igdumdx32.dll,igd10umd32.dll,igd10umd32.dll
Driver File Version: 8.15.0010.1883 (English)
Driver Version: 8.15.10.1883
DDI Version: 10
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 8/27/2009 07:54:00, 549888 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B78E66-6902-11CF-D774-FD10A7C2C535}
Vendor ID: 0x8086
Device ID: 0x2A42
SubSys ID: 0x30F7103C
Revision ID: 0x0007
Driver Strong Name: oem4.inf:Intel.Mfg:iCNT0:8.15.10.1883ci\ven_8086&dev_2a42&subsys_30f7103c
Rank Of Driver: 00E60001
Video Accel: ModeMPEG2_A ModeMPEG2_C ModeWMV9_B ModeWMV9_C ModeVC1_B ModeVC1_C
D3D9 Overlay: Supported
DXVA-HD: Supported
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled

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Sound Devices
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Description: Speakers and Headphones (IDT High Definition Audio CODEC)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HDAUDIO\FUNC_01&VEN_111D&DEV_76B2&SUBSYS_103C30F7&REV_1003
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: stwrt.sys
Driver Version: 6.10.6225.0000 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 7/22/2009 09:33:32, 409088 bytes
Other Files:
Driver Provider: IDT
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: No, No
I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No

Description: SPDIF (Digital Out via HP Dock) (IDT High Definition Audio CODEC)
Default Sound Playback: No
Default Voice Playback: No
Hardware ID: HDAUDIO\FUNC_01&VEN_111D&DEV_76B2&SUBSYS_103C30F7&REV_1003
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: stwrt.sys
Driver Version: 6.10.6225.0000 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 7/22/2009 09:33:32, 409088 bytes
Other Files:
Driver Provider: IDT
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: No, No
I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No