Screen resolution change constantly

XP PRO WINDOWS /LOGISYS MONITOR 710- SCREEN RESOLUTION SET 800X600-COLOR QUALITY WILL NOT STAY SET ABOVE 8 BIT-THE SETTINGS FOR DRIVER SAYS THE SYSTEM IS SET TO THE BEST UP-TO DATE DRIVER FOR XP PRO, CAN’T FIND ANY INFO FOR FIXING THIS PROBLEM!I KEEP GOING BACK TO THE DISPLAY-SETTINGS AND THEN ADVANCED-ADAPTER TAB DRIVER TAB-INSTALL SOFTWARE AUTO/WIZARD SAYS ADAPTOR IS FINE!