My computer not running like used to

Technical Support
Just wondering if anyone could notice something not right with my alienware
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600) (7600.win7_gdr.120305-1504)
Language: English (Regional Setting: English)
System Manufacturer: Alienware
System Model: M17x
Processor: Intel(R) Core(TM)2 Quad CPU Q9000 @ 2.00GHz (4 CPUs), ~2.0GHz
Memory: 4096MB RAM
Available OS Memory: 3838MB RAM
Page File: 2324MB used, 5350MB available
Windows Dir: C:\Windows
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
Display Devices
Card name: NVIDIA GeForce 9400
Manufacturer: NVIDIA
Chip type: GeForce 9400
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_0862&SUBSYS_02A11028&REV_B1
Display Memory: 1902 MB
Dedicated Memory: 239 MB
Shared Memory: 1663 MB
Current Mode: 1440 x 900 (32 bit) (60Hz)
Monitor Name: Generic PnP Monitor
Monitor Model: unknown
Monitor Id: SEC5442
Native Mode: 1440 x 900(p) (60.091Hz)
Output Type: Internal
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 8.17.0011.9716 (English)
Driver Version:
DDI Version: 10
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 3/16/2010 20:01:53, 11913832 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-4B22-11CF-6C56-AA220FC2C535}
Vendor ID: 0x10DE
Device ID: 0x0862
SubSys ID: 0x02A11028
Revision ID: 0x00B1
Driver Strong Name: oem18.inf:NVIDIA_SetA_Devices.NTamd64.6.1:Section024:\ven_10de&dev_0862&subsys_02a11028
Rank Of Driver: 00E60001
Video Accel: ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C

I can suggest two things to look at/try.

First, your video drives are pretty old and should be updated.

These should do:

Secondly, and more likely, some Alienware pcs have a feature called Stealth Mode

"Stealth Mode is designed to throttle back the CPU and GPU to decrease the energy consumption and noise output of the M15x (and the M17x too). To engage Stealth Mode, simply use the Stealth Mode odometer, conveniently located above the keyboard with the touch-sensitive controls."

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