Windows XP start with 640×480 Resolution

I change to bigger resolution, but when i restart computer, Windows change resolution to 640×480.
Answer #1
installed all necessary drivers ?
Answer #2
I think the graphic driver is not yet installed.
Answer #3
I think the graphic driver is not yet installed.
agree
get the latest from AMD/ATI, not the windows update one
http://support.amd.com/us/gpudownload/windows/Pages/radeonaiw_win8-64.aspx
under msconfig there is a low res (640×480) video mode
you might check that that’s not selected