Thanks, Stecal,
I did what you suggested, but for read-only button, it can not be unchecked. I notice that all folders are read-only, though you can write to it. Is it new feature of Windows XP? I checked the temp file in temp folder, it is less than 32 MB. There must be somewhere saying the size can not be larger than 32MB. I installed oracle on NT, Windows 2000, never had problem before. Is there any way I can make sure that temp folder has at least 32 MB? Thanks anyone for help.