Welcome to the (new) RMPrepUSB.com website
This site also contains over 150 articles (mostly about USB booting and grub4dos).
Please use the Site Map to see all the content on this site.
Looking for a Legacy\UEFI multiboot USB solution with UEFI Secure Boot support?
Try Easy2Boot (includes E2B, agFM and Ventoy menu systems)
Boot 99% of all ISOs from your E2B USB drive (and .VHD, .WIM, .EFI, .IMA, .IMG, etc.)
Get the eBooks (PDFs) from here with Exercises, downloads and instructions, etc.
eBook includes details of common BIOS bugs which many people are unaware of.
Popular pages on this site (newer pages have higher numbers):
007 - FakeFlashTest - test a USB flash drive to see if it is a fake
021 - Guide to grub4dos
054 – How to fix write-protected read-only drives and SD cards
089 - Restore a Windows (Legacy\MBR) system with just one key press
124 - Cold boot attack - capture DIMM contents to a file even if the system was switched off!
137 - A grub2 tutorial
142 - Restore Windows (UEFI\GPT) system with just one keypress
143 - Modify any WinPE WIM Desktop without changing the ISO!
147 - How to patch and compile Ventoy
--- - a1ive grub2 commands and notes
RMPrepUSB is a Windows 32-bit utility to partition and format a drive (especially USB drives).
- Install/repair boot code
- Clear write-protect\read-only drive flags
- Sector editor
- SD cards can be up to 10% faster (when formatted as FAT32)
- Test for 'Fake' size drives
- Fix various USB boot issues
- Run a 32-bit MBR Emulator to boot from a USB drive (QEMU) with full write access
- Includes the command line utility RMPartUSB.exe
Downloads (Windows executable .exe)
Latest version is RMPrepUSB 2.1.745A (which has small bugfix in RMPartUSB v2.1.751 2021-08-23)
Zipped downloads (to avoid false positive virus detection)
Tip: Right-click on link and choose 'Save link as...' if problems.