If the RAM-editor doesn't show any processes under Windows NT 4 you most likely don't have PSAPI.DLL installed on your system. It is not intended to used as full-fledged hex editor. It is a lightweight hex editor comes with only basic editing capability like Manual Edit (by directly selecting and replacing the code with new one), Edit using basic tools (cut, paste, select, etc.), etc. In order to still accomplish that, you will have to execute HxD from a boot CD/DVD like PartBE or VistaPE and edit the system disk from there. Funduc Software Hex Editor is another free hex viewer and editor software for Windows. Free Hex Editor Neo: Fastest Binary File Editing Software for Windows OS Not sure about this one - I don't like the idea of a 'beta' if messing about with HDD sectors but you can have a look wxHe圎ditor - a Free Hex Editor / Disk Editor for Huge Files or Devices on Linux, Windows and MacOSX.

It’s rich and handy set of features will help all software and hardware developers working with ASCII, hex, decimal, float, double and binary data. In this case, you may need some plugins like Hex Editor to view different types of text and programming. However, certain text files and programming languages can’t be opened and edited with Notepad++. Hex Editor Neo is a binary files editing software utility for Windows. Notepad++ is a widely popular free text editor and source editor used on Microsoft Windows. The easy to use interface offers features such as searching and replacing, exporting, checksums/digests, insertion of byte patterns, a file shredder, concatenation. HxD Hex Editor is a carefully designed and fast hex editor for Windows PC which, additionally to raw disk editing and modifying of main memory (RAM), handles files of any size.

Free windows hex editor download