Device Manager errors

[Guest]

I noticed two entries with yellow exclamation points under "Non plug and play
drivers": PartMgr and PCIIde- both saying Code24 "device not present...not
working...or drivers not installed."

I assume PartMgr is Partition Manager but have no idea what the other one
is. I recently have had a new external USB hard drive hooked up to my system
a few times, a Western Digital My Book Essential series, and installed,
partitioned and formatted the drive from FAT32 to NTFS file system. Since I
never had these error messages showing up in Device Mgr before I started
using the USB external drive, I assume they have something to do with it.
Nothing seems amiss so far with the operation but is this anything to be
concerned about? Thanks

DELL Dimension 2400
WinXp SP2
Pent 4 2.57Ghz
1 GB memory

 

[Guest]

Also, doesn't make any difference as far as these two errors showing up
whether I have the external hard drive plugged in or not.