How do i fix my PC native settings permanently?

from time to time my display settings changes automatically and i have to manually set it back,I have a 17'; monitor with the following PC specs:

[Display]

Processor: AMD Athlon(tm) 64 Processor 3200+ (2004 MHz)

Operating System: Windows Vista (TM) Home Premium, 32-bit (Service Pack 2)

DirectX version: 10.1

GPU processor: GeForce 6150 LE

Driver version: 191.07

Core clock: 425 MHz

Memory clock: 100 MHz (200 MHz data rate)

Memory interface: 32-bit

Total available graphics memory: 1087 MB

Dedicated video memory: 128 MB

System video memory: 0 MB

Shared system memory: 959 MB

Video BIOS version: 5.51.28.42.00

IRQ: 16

Bus: FPCIHow do i fix my PC native settings permanently?
You possible don't have the correct graphics driver on your system or it is possible that after you finished the setting you mentioned, you did not click on Apply or Ok to effect the changes you made.How do i fix my PC native settings permanently?
If you can檛 find the right Windows vista drivers manually I would recommend just getting a software program that can do it for you. There is a program I use which will find drivers for just about all hardware devices. The best part is it takes a snapshot of your system specifications and matches the right driver to go with it. Perform a free driver scan at: http://www.drivers-updates.net/drivers/w

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