Update: How to make a bootable thumb drive virus scanner for NTFS
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Some nice folks have recently told me about broken links in the article. Thank you! The NTFS4DOS tool I specified is still available. Datapol is still alive, apparently having been acquired by Avira, the German company who makes the free — and very good, I might add — antivirus program, Antivir. Here’s the full orignal article with all of the links checked and fixed:
My latest Kool Tekkie Tool (KTT, pronounced “kit”) comprises a thumb drive made bootable with Datapol’s NTFS4DOS; the latest version (3.16b) of FRISK Software International’s F-Prot Antivirus for DOS is run from the command line. Both of these utilities are free for personal use, but require payment if you plan to use them in a commercial setting: NTFS4DOS is only $25; F-prot is $29 for a 20-user license.
NTFS4DOS is, in itself, a KTT. It allows you to make an NTFS-capable floppy disk or thumb drive and comes with chkdsk and defrag utilities to boot. First, make your drive bootable by following the instructions in my LockerGnome article, “Kool Tool to Make Your Thumb Drive Bootable.” CAUTION! This will completely erase your drive; be sure you have your data backed up before you start. Then, download NTFS4DOS and run the setup. From the NTFS4DOS program group, select “Create NTFS-capable boot floppy.” Select the drive letter of your thumb drive and click Next twice. Your thumb drive is now bootable and NTFS capable.
Next, download F-prot, the latest virus signatures and the latest macro virus signatures and extract them to a folder on your thumb drive. You’re ready to go! Plug it in and let’s take it for a spin.
Make sure you set your PC’s BIOS to boot from your thumb drive. On most machines, you do this by making “USB” or “Removable Device” first in the boot order. If all goes well, the PC will boot to a startup menu. Choose NTFS4DOS; you’ll see the drives being mounted and if you are using the freeware version, the screen will scroll to the NTFS4DOS title screen; you will have to answer “yes” to the question “Do you use this version of NTFS4DOS for private usage only? (Yes/No):” You’ll see the mounted drives at the top of the screen and the C:\> prompt at the bottom. Change to the folder where you stored F-prot and run f-prot.exe to do a virus scan.
Pretty Kool, eh?
Cheers!
The Geek
Have a computer problem? A question about your latest gadget? Click here to Ask the Geek! Kenny “The Geek” Harthun has been playing with geeky stuff since 1965. He’s a Microsoft Certified Systems Engineer with Connective Computing, Inc. providing network, desktop and info security support services to a wide range of clients.

7 Comments
Che flaviano
July 17th, 2007
at 9:00am
The http://h18007.www1.hp.com/support/files/hpcpqdt/us/download/20306.html is not working… Also..NTFS4dos is not free to download anymore…
Che flaviano
July 17th, 2007
at 9:02am
Also is there a way to make my flash drive be loaded with anti-virus? so that when I try to use it to a different computer infected by a virus,my flash drive wont get infected ?
gnomewriter
July 19th, 2007
at 10:09am
Che - http://www.freewarefiles.com/program_9_90_11100.html has NTFS4DOS. Virus protection is available for your flash drive if it uses U3 technology: http://www.avast.com/eng/avast-u3.html. And the thumb drive utility can be found at http://h18000.www1.hp.com/support/files/serveroptions/us/download/23839.html
Cheers!
The Geek
Steve Willson
August 13th, 2007
at 8:54pm
PortableApps (freeware) is a flashdrive utility launcher which has a version of ClamWin AV you can run from the flash drive. I have it on mine, along with Firefox 2, Thunderbird 2, and GIMP. (Saved my butt a week ago when I had to reinstall XP and lost all my bookmarks and e-mail addresses. Fortunately they were all installed on PortableApps, so a quick export-import of my Mozilla data got me back online.)
http://portableapps.com/
Unfortunately they don’t yet have a spyware scanner.
James Reeve
September 23rd, 2007
at 2:29pm
Am I missing something? Can only get ntfs4dos to boot off floppy, not the thumb drive? Are the instructions out of sequence? Copying the ntfs4dos files onto the thumb drive gives it a tiny partition, not big enough to put the antivirus files on?
Bob
November 15th, 2007
at 7:52pm
same problem as James. if i choose the option to emulate a floppy, the drive is too small to add anything else. if i make the drive emulate a hard drive, i can’t load DOS.
here are more detailed instructions, but they didn’t work for me either:
http://elnexus.com/articles/floppy-vista.aspx
The Geek
November 19th, 2007
at 9:39am
James, Bob - it sounds like you’re both trying to use the NTFS4DOS floppy image instead of following the exact instructions in the article. Use the HP utility to make the thumb drive bootable, then simply copy NTFS4DOS.EXE to the thumb drive. The Geek