I bought a WD 120G 7,200 rpm ATA100 drive off eBay which is generating some errors in the event log during boot-up. There is a 10-15 second delay while Windows XP boots. The drive is attached as a slave on the primary IDE cable. The first error in the system event log is: The device, \Device\Scsi\nvidesm1, did not respond within the timeout period. I then get several of the following warning system events: An error was detected on device \Device\Harddisk0\D during a paging operation. When I unplug the slave drive I get no errors at all. So, it's either the drive or some conflict in my setup. I've noticed that the primary IDE drive (Maxtor) is ATA133 whereas this new one (Western Digital) is an ATA100. Would that cause any conflicts? I downloaded the Western Digital Lifeguard Diagnostics utility and ran an extended test on the drive which came up with no errors. After these initial errors (which happen before the event log has started - the times in the event log show this) I get no errors at all and the drive is working perfectly. I use the boot loader BING. If I go into maintenance and play about for a few seconds before booting I get fewer errors in the event log when XP starts (though I always get at least one). It seems to be a problem when the drive is starting and all works fine once it's up and running. Anyone else had something similar?