I have a desktop with an Asus P5K-E and a Core 2 quad cpu that I am using to run 64bit Home build 16241 on so I am pretty familiar with your specs. This is a classic example of why it is so helpful to post the kind of hardware info we were asking for. By coincidence you got a reply from a user pretty familiar with your configuration. Me.
Your issue is not about system specs. It obviously has been running 64bit previews on the partition you are trying to upgrade. Your question is about the specific build you are trying to install. Make sure you disconnect all usb peripherals that are not needed to operate the computer. Also remove any SD cards you might have left in the slot. In other words run with as bare bones a system as you can. Apparently 16241 breaks something that was working for you before. Be sure to report this issue in the Feedback Hub and include a link for this thread in your commentary.
Does the same error happen if you clean install build 16232 using an iso created from the Insider ISO site? 16232 was just posted on the site a few days ago. If that installs OK then you can set to Fast Ring and try to update to 16241 via WU again.