good day to all, i have a problem in my laptop before the ICONS display in the desktop is Small and normal but yesterday i install my USB flash drive when i scan it with my norton internet security 2011 it detected a virus (W32.Imaut) to fix that threat i RESTART my PC and when windows start my LOCAL AREA CONNECTION 2 icon was gone and i cant connect to the internet, then i RESTART again my Laptop when windows start again the icons in the desktop turns all into BIG and the screen become blurred, i try to change the SCREEN RESOLUTION but everytime i press the APPLY button nothing's happen, and the COLOR QUALITY set in Lowest 4bit and everytime i change the COLOR QUALITY into 32bit nothing's happen too.. please help me.. thanks a lot..

Here's the detail of my laptop:

System: Microsoft Windows XP
Home Edition
Version 2002
Service Pack 3

Registered to:
acer

Acer Incorporated
Intel[R]Atom[TM]
CPU N270 @ 1.60GHz
1.60GHz,0.99 GB of RAM