System is 2 weeks old: Board: ASUSTeK Computer INC. P5GC-MX/1333 Rev x.xx Bus Clock: 1333 megahertz BIOS: American Megatrends Inc. 0207 08/01/2007 2.40 gigahertz Intel Core2 Duo 64 kilobyte primary memory cache 4096 kilobyte secondary memory cache 3064 Megabytes Installed Memory Slot 'DIMM0' has 2048 MB Slot 'DIMM1' has 1024 MB 2878.35 Gigabytes Usable Hard Drive Capacity 2618.79 Gigabytes Hard Drive Free Space System OS - XP Professional SP2. Boot order: 1. Floppy 2. PLEXTOR DVDR PX-712A [CD-ROM drive] 3. SATA Drive - WCARW2614819, rev 12.01B02 When I boot up I have system set to boot from SATA drive. I have two hard drives connected via PCI controller (Silicon Image ATA-133 Medley Raid Controller card). Both drives are: Maxtor 6L200P0 [Hard drive] (203.93 GB) rev BAH41G10 I have four USB hard drives hooked up to a Belkin hub. Belkin hub has seperate AC connection. Each of listed USB hard drives plugged into Surge protection power strip. Maxtor 3200 USB Device [Hard drive] (500.11 GB) - drive 3 ST340063 3A USB Device [Hard drive] (400.09 GB) - drive 4 Seagate FreeAgentDesktop USB Device [Hard drive] (500.11 GB) - drive 5 Seagate FreeAgent Pro USB Device [Hard drive] (750.15 GB) - drive 6 When booting USB auto configuration passes ok. Memory check is ok. Computer hangs after identifying the four USB hard drives. My system BIOS has settings for USB of: 1.) Auto 2.) Disabled Windows does not launch. If I disconnect USB hub system starts without a problem but then I do not have the hard drives running. I can plug in USB hub after Windows has booted. Windows then detects them. Disk Management sees hard drives. All hard drives are NTFS. Any ideas how to resolve this issue? Would it help do split the external USB drives up & use a second USB hub? I await your reply. Thanx.