Boot problem

Could someone please help, whilst using Internet explorer on my pc ( windows xp home ) my computer froze and had to shutdown manually , upon rebooting i now get into the safemode/last good config option whenever i try either computer reboots and goes back to same screen , i am unable to enter either normal mode or safemode( safemode hangs when loading system 32 files for along while first before rebooting ) to try and sort out, does anyone how to get into safemode another way.