I had a similar problem with a laptop, a connected USB drive would stop windows from loading, or stop the bios, if the optional power supply was connected to the hub that the drive was connected to. The BIOS screen on my laptop would just stop at detecting a USB drive. I did a check drive on that drive and it passed, several times. It is FAT32.
On a new computer now, and a different USB drive (did not test the one above) will occasionally give me a blank screen after some BIOS booting screens, and I have to disconnect the power supply to proceed with loading WinXP. After disconnecting the power supply, I can immediately reconnect it. I have no problems accessing the drive before and after, and its happened while it was formatted in FAT32 and NTFS. (currently NTFS). It is freshly formatted (a new drive), with only a few GB of data on it when it was FAT32 and now (NTFS).
This only happens with the USB drives, none of my other USB connected devices. I am using the same hub, and it is connected, but it has not been connected to the optional power supply.
This seems to be a WinXP issue, or a driver issue. I tried google searching, but there are an amazing number of hits about loading Windows from a usb drive.
On a new computer now, and a different USB drive (did not test the one above) will occasionally give me a blank screen after some BIOS booting screens, and I have to disconnect the power supply to proceed with loading WinXP. After disconnecting the power supply, I can immediately reconnect it. I have no problems accessing the drive before and after, and its happened while it was formatted in FAT32 and NTFS. (currently NTFS). It is freshly formatted (a new drive), with only a few GB of data on it when it was FAT32 and now (NTFS).
This only happens with the USB drives, none of my other USB connected devices. I am using the same hub, and it is connected, but it has not been connected to the optional power supply.
This seems to be a WinXP issue, or a driver issue. I tried google searching, but there are an amazing number of hits about loading Windows from a usb drive.