I have installed my IBM IC35L060AVER07-0 hard drive as my primary slave. Each time I boot up my system I am notified that WinXP has identified the IBM drive as a new hard drive, and then eventually I receive an error message to the effect that WinXP is unable to install the hard drive because "one of the filter drivers installed for the device is invalid." Ironically, the hard drive seems to work just fine, and also the BIOS sees the slave drive. Moreover, I tested the HD as a primary slave in another computer running WinXP, and the drive installed and worked perfectly. My configuration is as follows: my primary master HD is a Maxtor 4K080H4, and my primary slave (the HD in question) is an IBM IC35L060AVER07-0. My system is a Sony Vaio PCV-RX551, and my BIOS is an AwardBIOS version 1004. I have set the jumpers on the two drives for master/slave and cable select, but either way the resultis the same. Any ideas or suggestions would be greatly appreciated.