Error Message: “Bad Command Structure”
error message occurs when you
extract files from a compressed folder
Translation: You’ve discovered another
minor bug in WinXP when you try to extract
a compressed file but only if you
type in a directory that does not exist on
your computer.
Solution: WinXP has built-in file compression
capabilities. This error occurs when you
right-click on a compressed file (with a .ZIP
extension) and decide to extract the file.
WinXP presents a dialog box where you can
type in the directory for the extracted file. If
you type in an invalid destination, you’ll
receive an error that WinXP was unable to create
the directory. Microsoft will undoubtedly
address this problem in the next WinXP service
pack.

Error Message: “Non-System disk or
disk error . . . Replace and strike a key
when ready.”
Translation: This simply means that
WinXP is attempting to boot from a disk (be it a
floppy diskette or one of your hard disks) that
doesn’t contain the system files
WinXP needs to start. WinXP needs
access to certain bits of information
when it starts up. Your hard drive’s
boot sector, a specific location on the
disk, contains the startup files WinXP
needs to continue the boot process. If
WinXP can’t find those files, the boot
process stops cold.
Solution: This one is either a simple
mistake or a catastrophe. First,
check to see if you have a floppy
diskette in your drive. Nine times out
of 10, this error is caused when you
leave a floppy in the disk drive, turn
off the computer, and then turn it on
again without taking the diskette out
of the drive. If the floppy is not a system
disk with the required boot files,
WinXP won’t launch. Check the floppy
drive, and if there is a diskette in
it, remove it and press any key on
your keyboard. Windows should
now start up normally.
If a forgotten floppy disk is not the
cause, then you’ve got a much bigger
problem on your hands. Somehow,
your hard drive’s boot sector has
been damaged or erased. This is typically
caused by either a boot-sector virus or a
hard drive failure. Most antivirus programs let
you create a rescue disk designed specifically
for those times when a virus renders your computer
unbootable.
If you created a rescue diskette, insert it into
your floppy drive, restart the computer, and follow
the antivirus software’s instructions to
clean the boot-sector infection and restore your
computer.
If you don’t have a rescue diskette, go to a
friend or co-worker who has one and either use
his or use his antivirus software to create one,
even if you use different antivirus programs.
Right now, your main focus should be on disinfecting
and booting your computer.

Error Message: When upgrading from
Windows 98/98SE/WinMe/NT to WinXP
Professional, the following error message
appears:
“Setup cannot upgrade your current
installation to Windows XP. Your copy
of Windows XP does not support upgrading
from an evaluation copy of
Windows. Setup cannot continue.”
Translation: The problem here is your
WinXP Pro installation CD may only be
designed to upgrade an OEM (original equipment
manufacturer) version of Windows 2000.
In other words, you have the wrong type of
WinXP installation CD for the type of upgrade
you’re trying to do.
Solution: Contact the OEM or reseller
where you purchased the CD and obtain a
valid WinXP Pro upgrade CD-ROM.

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