First system details:- --> Dual boot, Win98SE in C & WinXP with SP2 in D --> 128Mb DDR RAM --> ZoneAlaram Firewall (with latest updates) --> AVG 7 FREE Antivirus Now my problem:- Windows XP failed to boot: in normal as well as safe mode. During booting process (after selecting Windows XP only - Win98 is ok)recd error message "ISASS.EXE System Error. Object not found. Happened at the time when I was trying to reinstall my modem driver - after uninstallation of modem driver. At present I'm not able to boot Windows XP in normal mode or safe mode Pls help.