1) Copy the whole rar archive content to the USB drive. Do not copy it to any
directory, but directly to the USB drive root!
2) Switch to the USB drive and run the makeboot.bat batch file. It is VERY
IMPORTANT to run this file from the USB drive, otherwise it can corrupt
your hard drive master boot record and make your Windows operating system
un-bootable!
The makeboot.bat batch file will display the drive letter to which it will
install the boot sector.
MAKE SURE THIS DRIVE LETTER CORRESPONDS TO THE USB DRIVE.
3) Now the AVG Rescue USB should be bootable. You can restart your computer
and try to boot from the USB drive. Please make sure your BIOS supports
booting from USB drive and you have properly set the boot device sequence.