LPS = U.S. Dept. of Defense offers up tiny (135MB), secure Linux distribution = Lightweight Portable Security (LPS)
-$0
LPS can be used on either a PC or Mac and does not require the installation of anything and no hard drive access at all. Running it from a CD means there is absolutely no way the OS can be compromised, and even if it runs from a USB stick the chances are very small that an infection can happen, especially as it executes entirely in RAM sandbox. The number of applications included is small, but functional.
mod_speling.c - To make URLs case-insensitive, since the module mod_rewrite doesn't work.
Getting rid of Linux
Dale loaded Red Hat Linux on his 100MHz Aptiva, and now he can't reinstall Windows. Every time he boots from a DOS floppy, LILO (the Linux Loader) chokes after "LI." He also pulled the battery on his CMOS to wipe all its settings out. (Urg...)
First, I'd check your BIOS settings to make sure you're looking to boot from your floppy, then your hard drive. Right now, it sounds as if your system defaulted to booting from the hard drive. Then I'd boot using the Windows/DOS disk, and FDISK and format the drive with a format/MBR. That'll clean up the master boot record.
If you can't format or FDISK the drive, it probably has a Linux partition on it that DOS can't deal with. You'll need to run a Linux tool to wipe it. The closest one at hand is probably the one on the RedHat install disk. Just exit the install after you've wiped the Linux partitions.