Monitor resolution keep changing while turning-on the pc!

M

I have LG Flatron E700SH monitor. When i turn on my pc the intel logo appears on screen at that time when i press setting key which is given in front of monitor it reads resolution of 800*600/75 Hz User Mode. Then i keep continue and Windows XP logo appears at that time resolution shows 800*600/85 Hz User Mode. Then user screen appears where we have to enter our password at that time resolution shows 1024*768/ 85Hz Preset Mode and it remains same till i shut down my pc. And when i again turn on my pc the above said resolutions starts similar way. I am worrying about not by my resolution but microsoft windows xp logo and fonts appears very big and very haphazardly arranged so i can't see right bottom lines. I have tried to reinstall Windows XP and drivers but nothing helped me. My mother board is GA-8I865GVMF-775. Which drivers i have installed they are as below:

Audio Driver
Date : 2004/09/06
Description : ADI AD1885, 1888
Version : 5.12.01.5170
Size : 20.28 MB

Chipset Driver
Date : 2004/11/12
Description : Intel INF installation
Version : 6.2.1.1001
Size : 2.47 MB

LAN Driver
Date : 2007/02/08
Description : Marvell Lan driver
Version : 8.61.3.3
Size : 7.86 MB

VGA Driver
Date : 2006/05/17
Description : Intel VGA (845/865) Driver
Version : 14.5.0.3865
Size : 4.91 MB

Kindly show me some solutions to over come this problem.
Thanking You
Mayank

i think that normal, wait for other members for their posts

Normally an auto adjust button will be there which corrects the problem.I think its actually the problem with screen orientation.

------------------------------------------
Suggestions are based on reference.Try at your risk