Many users of the 32-bit version of Windows 7 were disappointed that not all of their 4GB of RAM (or more) could actually be used by the operating system. Many opted for the 64-bit version of Windows 7 but still had trouble getting the operating system to recognize and use all of the memory installed in the PC.
Windows 7 Starter 32-Bit: 2GB. 4GB: Windows 7 Ultimate 64-Bit. This article needs an update. MacOS can now support 1.5 TB of RAM at least since the Mac Pro.

The famous ram patch by rloew is now available to the public through permission of his son! Rloew has been known for his fantastic advancements onto Windows 9x that could not be imagined to be possible! His ram patch is probably the best known of his many achievements. With this, Windows 9x systems can utilize up to about 4gb of ram. Install and enjoy!
Features:

Apparently the BIOS update solves this issue. After going back into vista 64 and perform the bios update, 4GB of RAM shows up. I hope this thread will be useful for anyone who have. Jun 24, 2019 No-one has yet managed to provide us with a convincing use-case for where a 64-bit OS actually provides a real, quantifiable benefit to end-users. 32-bit accesses the entire RAM of the 4GB Pi 4. 64-bit code is invariably larger than 32-bit code – compare the sizes of the 32-bit and 64-bit versions of Windows 7; the 64-bit version is 30-40%.

-Use up to 4gb of ram on Windows 95, 98, and ME
-Enhanced system stability >512MB ram
-Simple installation
-Compatible with any Windows 9x PC
Requirements:
Windows 95/98/ME

Instructions:
1) Unzip files
2) Open PATCHMEM.EXE Ram

3) Reboot Windows
4) Enjoy

Components:
4gb

PATCHMEM.ZIP
Notes:

Windows 7 Starter 4gb Ram Patch Free

-If using a physical computer, be sure your motherboard natively supports the amount of ram you desire. The patch is ineffective if the bios cannot see all the ram.
-Windows 9x's user memory space is limited to 2GB due to being hard-coded.
Screenshots:

VMWare appears to have a bug and does not allow all 3.5gb of ram.

Windows 7 Starter 4gb Ram Patch System

Windows 7 Starter 4gb Ram Patch Notes

Proof of bug on VMWare; image from LoneCrusader.

Download the 4GB Patch
Current Version: 1.0.0.1

I originally wrote this tool for a friend of mine who needed it. This very little tool patches x86 executables in order to let them have 4GB (instead of only 2) of virtual memory on x64 platforms. This tool comes very handy for applications which need a great amount of virtual memory like games, 3D renderization, multimedia etc. To gain these 2GB, you just have to use this tool to patch the executable (*.exe file) of the software you want to have these additional GBs of virtual memory. It can be used by clicking on it and choosing the file or through command line (e.g.: “4gb_patch file.exe”). It automatically creates a backup copy of the original executable.

Windows 7 Starter 4gb Ram Patch Download

Why things are this way on x64 is easy to explain. On x86 applications have 2GB of virtual memory out of 4GB (the other 2GB are reserved for the system). On x64 these two other GB can now be accessed by 32bit applications. In order to achieve this, a flag has to be set in the file’s internal format. This is, of course, very easy for insiders who do it every day with the CFF Explorer. This tool was written because not everybody is an insider, and most probably a lot of people don’t even know that this can be achieved. Even I wouldn’t have written this tool if someone didn’t explicitly ask me to.