When i switch on the system(WINXP-SP3), after the Welcome screen i am getting background screen but my icons are not appearing immediately. i am getting the icons only after 2-3 minutes until than i am getting only the
background screen. usually i use to get all the icons and the windows scrren imeedaitely but it suddenly taking ages. why is it so?

Anyone can please help me

Note: Just 5 days ago I formatted and reinstall from scratch then also...

Thanks