text: enabling pae on windos xp home sp2? i have 4 mb of ram windos xp sp2 reeports only 3.25.  i have read the gobildy-gook on ms windows site about enabling pae and its doubble duch to me.  how & where do i add the pae swich in this, my current boot.ini file  [boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)partition(1)&#92;windows [operating systems] multi(0)disk(0)rdisk(0)partition(1)&#92;windows="microsoft windows xp home edition" /fastdetect /noexecute=optin  thanks in advance for any and all help i think you are looking in the wrong place for the answer pae will not find the missing ram. pae (physical address extension) is a feature provided on recent processors to allow the use of memory above 4gb (the limit on 32bit system). as you do not exceed the standard 4gb limit of a 32bit system pae would be useless.