Using Kon-Boot from a USB Flash Drive: Bypass those pesky Windows and Linux login passwords completely Using Kon-Boot from a USB Flash Drive: Bypass those pesky Windows and Linux login passwords completely Kon-boot is a cool tool you can download from that boots from a CD or floppy and modifies memory to let you login without knowing a local account password in both Windows (even up to Windows 7 32bit SP1) and Linux (not all distros). Kon-Boot is sort of a boot loader that let's you bypass having to use valid credentials when the OS finishes booting. Unfortunately, CDs are hard to put in your pocket, and many machines don't have floppies any more. What I needed was to be able to put Kon-Boot on my pico USB thumbdrive. I found some details online about how to get it on a thumbdrive using the floppy image and, but I had some problems with it doing an infinity loop when I tried to use Kon-Boot from a USB flash drive (worked fine on the same box from a CD). I read some of the comments on Raymond's blog, and someone pointed out the problem but did not really give the file changes to fix it (which I will give below).