For those who are getting this error when you try to install WinXP on a motherboard that has UDMA 100 Promise Controllers you need to do the following in order to get XP to install correctly if your hard drives are connected to the UDMA 100 controller.

Now there are two ways to get XP installed, the first one I am going to mention is the easiest way and the second is a bit more complicated but will work never the less.

#1 - Easiest Way
I have an Asus A7V motherboard and I have run into this more than once. What you need to do (this is the easiest way to do it that I have found) is to move your hard drives cable off the UDMA 100 controller (normally color coded blue) over to the UDMA 66 master controller on the motherboard. Once you have done that make sure your PC still boots into your current OS correctly. If it does then start your XP install or upgrade. Everything should be fine. Now, once XP is up on My Computer and choose Manage. Look under Device manager and you will see an error with a yellow exclamation point on it. Right click on it and install the Promise Drivers. You can download them directly from here -
ftp://ftp.promise.com/Controllers/IDE/Ultra66/UltraFamily/U100d160b32.zip
Once you have the drivers installed re-boot the system and make sure the yellow exclamation points are gone and the promise drivers are listed under SCSI devices, if they are then turn off your system, move the HD's back to the UDMA 100 controller and boot it up. That should fix it.


#2 - Fresh Install
If you plan on installing XP to a freshly formatted hard drive the easiest way I have found to do this is to use the above method but for those with only one UDMA 66 controller on there motherboard you may need to do the following:

- First use the URL above and download the Promise drivers from the Promise website.
- Second you need to extract the drivers to a floppy or to the partition on your hard drive that XP can see (FAT32 works great for this) but there is a trick to this in order to make XP see the drivers. Once you extract the drivers the promise drivers automatically make folders for each individual OS (see screen shot), what you need to do is move the files from under the Win2K directory to the of the Promise Folder. So you take the three files under the Win2K folder and copy them, don't move them but copy them to the root of the main folder where you extracted the Promise drivers to (if you don't see three files go to Tools/Folder Options/View and check "show hidden files"). The three files you need to copy to the area are:
- Ultra.cat- Ultra.inf- Ultra.sys
Now that you have all the files in the copy them to a floppy, reboot (if needed) and start your install of XP.

Now pay attention here - at the bottom of the very first blue setup screen you will see a prompt to hit F6 to install third party SCSI or RAID drivers. HIT F6 A FEW TIMES NOW!!! Now it might take a couple of seconds but you should be prompted to insert your drivers into your floppy drive. Do so and choose the Promise ATA100 controller. Keep this disk handy as you will be prompted for it one more time during the install.

Once XP has the drivers and loads them successfully XP should install just fine, well at least as far as the controller goes.

What are XP powerToys
PowerToys are additional programs that developers work on after the product has been released to manufacturing, but before the next project has begun. These toys add fun and functionality to the Windows experience.

We've taken great care to ensure that PowerToys operate as they should. But please note that these programs are not part of Windows and are not supported by Microsoft. For this reason, Microsoft Technical Support is unable to answer questions about PowerToys
The PowerToys are installed into the directory you specify during setup. Typically this is the system32 directory.
To uninstall the PowerToys, Open the control Panel. Launch the Add/Remove Programs control panel applet. Find the PowerToys for Windows XP entry, and choose Modify/Remove. From here you can remove specific toys or all of them.

Faster User Switcher
Note: You cannot use this toy if fast user switching is not enabled.
What it is: With Fast User Switching enabled on Windows XP, this PowerToy allows you to switch users without having to use the logon screen.Special requirements: This PowerToy requires a Windows key on your keyboard.How to use: Press the Windows key then the Q key to activate; release and press Q to switch to a different user tile, then release both Q and Windows key to switch to that user.

Shell Player
What it is: This PowerToy plays MP3 files and WMA files from the taskbar.How to use: Right click on the taskbar, click toolbars, then click "Audio Player." If the taskbar is locked and you want to resize the player, you will have to unlock it. This will allow you to access the play list editor and view all the buttons.

Task Switcher
What it is: Replaces the existing Alt + Tab application switching mechanism of Windows XP. It provides a thumbnail preview of windows in the task list and is compliant with the new Windows XP visual style.How to use: (NOTE: You must log off and then log on again for the changes to take effect). Use just as you do the existing Alt + Tab mechanism by pressing the Alt key and the Tab key to activate. While holding down the Alt key, press the Tab key to cycle through running applications. To move backwards, press Shift + Alt + Tab. Release all keys when the desired application is highlighted.

Open Command Window Here
What it is: This PowerToy adds an "Open Command Window Here" context menu option on file system folders. This gives users a quick way to open a command window (cmd.exe) pointing at a selected folder in the Explorer UI.How to use: After installation, right click on the folder you would like to have a quick launch command window for.

Tweak UI
What it is: Provides access to system settings that are not exposed in the Windows XP default user interface.How to use: Go to Start, All Programs, Accessories, TweakUI for Windows XP.

PowerToy Calc
What it is: Graphing calculatorHow to use: Go to Start, All Programs, Accessories, PowerToy Calc

Bulk Resize for Photos
What it is: Allows you to make a new, resized copy of your selected pictures in the same folder they are currently located in. You can opt to resize one or many pictures (as a batch).How to use: Right click any image(s) and select Resize Pictures in the context menu.

ISO Image Burner
What it is: Allows you to burn an ISO Image using a CD-ROM burner that is compatible with Windows XPHow to use: Go to Start, All Programs, Accessories, ISO Burner

Slide Show Generator
What it is: Generate a slideshow when burning a CDHow to use: Add only images to a CD-ROM using Windows XP Explorer, then Write these files to disk. A new task is presented in the wizard for generating the autorun for the slideshow.

Virtual Desktop Manager
What it is: Manage up to 4 desktops from the Windows Shell Taskbar.How to use:Right click on the taskbar, click toolbars, then click "Desktop Manager." If the taskbar is locked and you want to resize the manager, you will have to unlock it.

Background Wallpaper switcher
What it is: Allows you to switch the background image periodically.How to use: Access this PowerToy by right clicking the desktop, click properties. It has added a new tab that will allow you to specify the interval as well as the directory to obtain the images from.

Taskbar Magnifier
What it is: Allows you to magnify part of the screen from the taskbar.How to use:Right click on the taskbar, click toolbars, then click "Taskbar Magnifier." If the taskbar is locked and you want to resize the magnifier, you will have to unlock it.

Slide Show Wizard

What it is: This wizard helps you create a slide show of your digital pictures. When you're done, you can put your slide show on the Web so that your family and friends can view it.How to use: Launch the Wizard from the Start Menu under All ProgramsPowertoys for Windows XPSlide Show Wizard. Follow the steps of the wizard to select and arrange your pictures, choose from a few simple options, and then save a Web-ready HTML slide show to a folder.

In My Computer click Tools menu, and then click Options.

Click the File Types tab.In the list of file types, highlight "(NONE) Folders"

Click Advanced button, In the Actions box, highlight "Explore"

Click "Set Default"

Although the big argument used to be about saturated and unsaturated fats, today's generation has found a new source of disagreement: Should a computer be left on all the time or turned off at the end of the day? Both camps have decent arguments, and there's no real answer (except that you should always turn off your monitor when you won't be using it for a half hour or so).


However, if you decide to turn off your computer, don't just head for the off switch. First, tell Windows XP about your plans. To do that, click the Start button, choose the Turn Off Computer command, and ponder the choices Windows XP places on-screen.


Click Stand By to temporarily put the computer to sleep, click Turn Off to turn off your computer, or click Restart to make Windows XP shut down and come back to life.


Stand By: Save your work before choosing this option; Windows XP doesn't save your work automatically. Instead, it lets your computer doze for a bit to save power, but the computer wakes up at the touch of a button


Turn Off: Clicking here tells Windows XP to put away all your programs and to make sure that you've saved all your important files. Then it turns off your computer and most of the newer monitors. Poof! Use this option when you're done computing for the day. (If your monitor doesn't turn off automatically, you'll have to push its power button yourself.)


Restart: Here, Windows saves your work and prepares your computer to be shut off. However, it then restarts your computer. Use this option when installing new software, changing settings, or trying to stop Windows XP from doing something awfully weird.


Hibernate: Only offered on some computers, this option works much like Shut Down. It saves your work and turns off your computer. However, when turned on again, your computer presents your desktop just as you left it: Open programs and windows appear in the same place. Putting your computer into hibernation mode is not as safe as shutting it down. (Don't see the Hibernate feature? Hold down Shift, and it will replace the Standby button.)


The Hibernate command takes all of your currently open information and writes it to the hard drive in one big chunk. Then, to re-create your desktop, it reads that big chunk and places it back on your desktop.


Don't ever turn off your computer unless you've chosen the Turn Off command from the Start button. Windows XP needs to prepare itself for the shutdown, or it may accidentally eat some of your important information — as well as the information of anybody else using the computer at the time.


Remember, if you're done with the computer but other people might want to use it, just click Log Off from the Start menu: Windows XP saves your work and brings up the Welcome screen, allowing other people to log on and play video games.