I'm troubleshooting a Win98 machine that will not boot. The error, "Explorer performed illegal operation", is displayed on a gray screen with a "close" button. When booting from a 98 diskette, the error, "vfat device initialization failed-device or rescource required by vfat is not present or is unavailable", is displayed (I think there is a message or two prior to this but I don't remember what). I've worked through the MS article 139063 for the possible causes, but to no avail. One cause says, "...the config.sys file contains a line that points to a previous version of the Ifshlp.sys file". I assume the version refers to the file's size and date which are 3,708 and 4/23/99, respectively. Any suggestions for further troubleshooting? Thanks Kurt http://www.myildportal.com referral number: 1827854 password: guest