Windows Vista Slow - I even can not run a Linksys installation set

Hi

I bough a lap top few months ago and since the beginning it is very slow. I
followed the instructions contained in Windows Vista help but it is still
slow.

I am trying to install a Linksys router. When I insert the installation CD
the lap top "keeps thinking" a very long time and do not launch the
installation set up. I tried to do the same in another lap top (windows XP)
theoretically less powerful than mine and it worked very well.

I changed the video resolution as Vista helps suggests but it did not work.

Index Base Score:
Processor - 4,7
Memory(RAM) - 4,5
Graphics - 3,3
Gaming Graphics - 3,1
Primary Hard Disk - 4,1
Base Score - 3,1

Specs:
Model: Sony Vaio
Processor: Intel(R) Core(TM)2 CPU T5500 @ 1.66GHz 1.67GHz
Memory: (RAM) 2.00 GB
Intel(R) Graphics Media Accelerator Driver for Mobile Report
Report Date: 09/08/2007
Report Time[hr:mm:ss]: 10:21:42
Driver Version: 7.14.10.1114
Operating System: * , (6.0.6000)
Default Language: Portuguese
DirectX* Version: 10.0
Physical Memory: 2037 MB
Minimum Graphics Memory: 8 MB
Maximum Graphics Memory: 224 MB
Graphics Memory in Use: 42 MB
Processor: x86 family 6 Model 15 Stepping 2
Processor Speed: 1662 MHZ
Vendor ID: 8086
Device ID: 27A2
Device Revision: 03