By Greg ShultzThe ability to boot Windows XP from a USB Flash Drive (UFD) offers endless possibilities. For example, you might makean easy-to-use troubleshooting tool for booting and analyzing seemingly dead PCs. Or you could transport your favoriteapplications back and forth from home to work without having to install them on both PCs.However, before you can create a bootable UFD, you must clear a few hurdles. You saw that one coming didn’t you?The first hurdle is having a PC in which the BIOS will allow you to configure the USB port to act as a bootable device. Thesecond hurdle is having a UFD that that will work as a bootable device and that’s large enough and fast enough to boot anoperating system such as Windows XP. The third hurdle is finding a way to condense and install Windows XP on a UFD.If you have a PC that was manufactured in thelast several years, chances are that its BIOSwill allow you to configure the USB port to actas a bootable device. If you have a good qual-ity UFD that’s at least 512 KB and that wasmanufactured in the last couple of years,you’ve probably cleared the second hurdle.And once you’ve cleared those first two hur-dles, the third one is a piece of cake. All youhave to do is download and run some free soft-ware to create the bootable UFD.I’ll start by showing you how to determinewhether your PC’s BIOS will support bootingfrom USB and explain how to configure it to doso. Then, I’ll show you how to download anduse the free software to create a bootable UFDrunning Windows XP Professional.The UFD hurdleYou probably noticed that I didn’t men-tion how to determine if your UFD wouldsupport being configured as a bootabledevice, except that it must be a goodquality unit of recent manufacture. Well,I’ve discovered that when it comes tothe actual UFD, you’ll just have to try itand see what happens. As long as youhave a PC with a BIOS that will allowyou to configure the USB port to act as abootable device and you have config-ured the installation correctly, it shouldwork. If it doesn’t, you probably have aUFD that can’t boot.I tested three UFDs on two new comput-ers and had mixed success. First, I at-tempted to use a 128 MB PNY Attachebut received an error message that said“Invalid or damaged Bootable partition”on both PCs. Next, I tried a 1GB Gate-way UFD and it worked on both PCs.Then, I tried a 256 MB Lexar JumpDrivePro and it worked on only one of theFigure A:The settings on the Boot Screen of the PhoenixBIOS made ita no-brainer to select the device.Figure B: A USB boot option didn’t appear on the Boot Sequence screen.Illustrated tutorial: Creating a bootableUSB flash drive for Windows XPVersion 1.0February 15, 2007Page 1Copyright ©2007 CNET Networks, Inc. All rights reserved. For more downloads and a free TechRepublic membership, please visit http://techrepublic.com.com/2001-6240-0.htmlPCs. You can find lists of UFD brandsthat others have had success with onthe Internet.Checking the BIOSNot every new BIOS will allow you toconfigure the USB port to act as abootable device. And some that doallow it don’t make it easy. On one ofmy example systems, it was a no-brainer. On the other, the UFD had tobe connected to the USB port beforeit was apparent that I could configureit as a bootable device. Let’s take acloser look.On the test system with aPhoenixBIOS version 62.04, I ac-cessed the BIOS, went to the bootscreen, and found that USB StorageStick was one of the options. I thenmoved it to the top of the list, asshown in Figure A, thus making it thefirst device to check during the bootsequence. (This particular BIOS alsoallowed me to press the [F10] keyduring the boot sequence and selectany one of the available bootable de-vices, so it really wasn’t necessary tomove it to the top.)On the test system with an AMI BIOSversion 2.59, I accessed the BIOS,went to the Boot Sequence screen,and didn’t find a USB boot option, asshown in Figure B. I then went onestep further and checked the HardDisk Drives screen and still didn’t finda USB boot option, as shown inFigure C.I then plugged a UFD into the USBport, booted up the system, and ac-cessed the BIOS. When I checked theHard Disk Drives screen, the UFD ap-peared in the list and I could select itas the first drive (Figure D).When I returned to the Boot Sequencescreen, the UFD was indeed set asthe first bootable device (Figure E).Figure C: The Hard Disk Drives screen showed only the SATA hard disk.Figure D: With the UFD plugged into the USB port, I could configurethe UFD as a bootable device.Figure E: As the Boot Sequence screen indicates, the UFD was set tobe the first bootable device.WarningDo not run the Windows Server 2003 SP1 executable file! Doingso will completely corrupt Windows XP. We will use a set ofspecial commands to extract the two files and then delete therest of the package.Illustrated tutorial: Creating a bootable USB flash drive for Windows XPPage 2Copyright ©2007 CNET Networks, Inc. All rights reserved. For more downloads and a free TechRepublic membership, please visit http://techrepublic.com.com/2001-6240-0.htmlRounding up thesoftwareTo condense and install Win-dows XP on a UFD, you’llneed a program called PEBuilder by Bart Lagerweij.You’ll also need two files fromthe Windows Server 2003Service Pack 1. And ofcourse, you need to have aWindows XP ProfessionalCD.You can download PE BuilderfromBart’s Web site. At thetime of this writing, the mostcurrent version of PE Builderwas 3.1.10a.You can download WindowsServer 2003 SP1 by followingthe link in the KnowledgeBase article“How to obtain thelatest service pack for WindowsServer 2003.” Be sure to getthe 32-bit version!Keep in mind that at 329 MB,Windows Server 2003 SP1will take some time to down-load. And although you needjust two small files, the onlyway to get them is to down-load the entire package.Preparing thesoftwareInstalling PE Builder is quick and easy. Just run the installation program and follow the onscreen instructions. To makethings simpler, I installed the program in the root directory in a folder called PEBUILDER3110a.Once PE Builder is installed, you’ll need to create a folder in C:\PEBUILDER3110a called SRSP1, as shown in FigureF. This is the folder in which PE Builder will look for the extracted Windows Server 2003 SP1 files.Now, you can begin extracting the two needed files from Windows Server 2003 SP1. When you download the WindowsServer 2003 SP1, the executable file will have a long