HP Compaq 6300 SFF Not recognising greater than 2GB RAM

[jjay0220]

HP Compaq 6300 SFF Not recognising greater than 2GB RAM, & that only works in slot 1. this was found after recent W-10 upgrade which caused the OS to fail. OS has been reloaded, Bios has been updated but problem 

[itsmyname]

@jjay0220 -- remove the RAM from slot #1. Move the RAM from slot #2 to slot #1. 

Restart your computer, while tapping the ESC keyboard key.

When you see a start-up menu, choose to run the HP Hardware Diagnostic against that stick of RAM.

Pass? Fail?

[jjay0220]

PC will not boot if anything is in the other 3 slots. Also PC will not boot if anything larger than 2GB is used is slot 1, a good 4GB or 8GB will not work.

[itsmyname]

@jjay0220 -- is this your computer: HP Compaq Pro 6300 Small Form Factor PC Specifications | HP® Customer Support

It lists 4 sockets for RAM, and support for 8 GB per socket.

Is the RAM the original that came with the computer, or some other RAM that you purchased separately?

[jjay0220]

It has been working 2 , 4GB & 2, GB, for a total of 12 GB for a long time. That stopped during recent W-10 Update, so ??????. Now slot 1 is the only one PC will boot to & only with no more than 2GB of Ram.

[itsmyname]

@jjay0220 -- that is weird, especially if you have a 4GB memory-stick in the "DIMM #1" position.

I think that it is just a coincidence that the Windows Update caused the change in the motherboard's capability to recognize the 4 sticks of RAM.

When you first power-on your computer, immediately press ESC, to see a menu.

Choose either "Enter BIOS Setup" (where you can view the amount of RAM that is detected by the motherboard), or "run HP Hardware Diagnostics" (where it will report the amount of installed RAM, and will run extensive tests against the RAM).

Within Windows, can you launch the "System Restore" app on your computer, to "time-warp" your computer back to a date/time before the update was applied? I doubt that this will solve your issue.