1801 Microcode update error after changing the processor on my HP Compaq dx 6120

[Mwango]

Hi,

Help please, am experincing 1801 Microcode update error after changing the processor on my HP Compaq dx 6120 MT

[Prométhée]

Hello

[start]This is an automatic response
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Some elements may therefore not apply to you 
To be able to answer you effectively, we need some information

we need the exact model of your computer, and the product number
To find it follow this
for a desktop computer

HP Desktop PCs - How Do I Find My Model Number or Product Number? | HP® Customer Support
and for a laptop
HP Notebook PCs - How Do I Find My Product Name or Number? | HP® Customer Support

Give the full name with the product number P / N

this is not a model:
HP Desktop M01-F1xxx
the requested product number must look like this
Product Number: 9EE50AA # ABA
the model corresponding to this number will therefore be
HP Desktop - M01-F1033wb

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https://support.hp.com/us-en/product/hp-compaq-dx6120-microtower-pc/456580/manuals

HP Compaq dc71xx and dx61xx Series Business Desktop Computers Technical Reference Guide, 2nd Edition

1801-Microcode
Patch Error
Processor is not
supported by
ROM BIOS.
1. Upgrade BIOS to proper version.
2. Change the processor.

 Troubleshooting Guide

[Paul_Tikkanen]

Hi, @Mwango 

What model processor did you install?

The supported processors for the dx6120 MT can be found at the link below.

untitled (hp.com)

Intel Celeron D Processors with thermal grease and alcohol pad

* 2.8 GHz/533 MHz FSB, 256 KB cache    391941-001
* 3.06 GHz/533 MHz FSB, 256 KB cache 405693-001
* 3.2 GHz/533 MHz FSB, 256 KB cache    382503-001

Intel Pentium 4 Processors with thermal grease and alcohol pad

* 2.8 GHz/800 MHz FSB, 1 MB cache      394643-001
* 3.0 GHz/800 MHz FSB, 2 MB cache      419651-001
* 3.06 GHz/533 MHz FSB, 1 MB cache    412985-001
* 3.2 GHz/800 MHz FSB, 2 MB cache       384786-005
* 3.4 GHz/800 MHz FSB, 2 MB cache       384787-005

If you installed a different processor than one of the above, you would have to remove it and install a supported processor.

The latest BIOS update I could find for your PC is this one, and it was written to be run on Windows XP.

I have no idea what will happen if you run it on Windows 7.

It may work fine, or it may wreck your PC.

Note:  This BIOS update adds support for the following processor microcodes:

Updates Intel Pentium 4 Processor microcode for F34, F41, F43, F49, F4A, F64, and F65 steppings.

Info:

https://ftp.hp.com/pub/softpaq/sp33001-33500/sp33315.cva 

Exe:

https://ftp.hp.com/pub/softpaq/sp33001-33500/sp33315.exe