Intel (RK80532PG0881M) Pentium 4, 3 GHz Processor Logo
Posted on Sep 09, 2009
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1801-microcode patch error

I have an compaq evo....2.4ghz processor, 512 md ram and 40gb hard disk. every time i start my system it shows me 1801-microcode patch error, while showing f1 to boot in left corner, when i press that, system starts working. rest i m okay..

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Norman Al-Anbar

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  • Posted on Sep 09, 2009
Norman Al-Anbar
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Hi according to HP memo see the following answer hope it help:

DESCRIPTION After installing a different system board or processor in systems described in the "Scope," the systems may halt during POST and display an 1801 Microcode Patch Error with a prompt to press the F1 key to continue.
NOTE Pressing the F1 key will allow the system to continue. However, processor performance may not be optimized and the error will repeat each time the system is restarted. HP recommends that the microcode be updated to ensure optimum compatibility and performance.

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My compaq computer displays 1801-microcode patch error -missing or invalid processor microcod patch please contact compaq computer corporation For a new rom processor stepping what do i do
Contact Compaq on their website to get instructions for your specific processor.
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"1801 Microcode patch error. Missing
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=us&prodTypeId=12454&prodSeriesId=96295&prodNameId=97121&swEnvOID=1093&swLang=13&mode=2&taskId=135&swItem=PSG_I15378-37635

And follow the instructions here to upgrade the BIOS. I suggest using their instructions as they will be far more accurate than mine for this specific system and BIOS update.
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I just install 2.0GHz processor but my system keep giving 1801 microcode patch error, what do i do?
The 1801 error is defined as:
Missing or invalid Processor Microcode Patch.

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Applying a new ROM BIOS to support the processor stepping.
In other words, you need a BIOS upgrade. Contact your BIOS vendor and get support for your new processor.
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Dear sir, i have two compaq evo d300 desktop d3d/p1.7/128c/6 sa i have replced new intel 2.8GHZ/512 PROCESSOR WITH 1GB SD RAM. I AM GETTING A MASSAGE 1801- MICROCODE PATCH ERROR. PLEASE HELP ME TO...
Did you upgrade the ROMpaq before swapping the processors? the bios my not be able to recognize the processor you upgraded to.

http://forums13.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1282749109495+28353475&threadId=1109463

Hope this helps
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find out your motherboard name,or use cpu-id to see it,and go to your motherboard page,and download latest bios,and flash it,that should fix the problem...
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Mar 27, 2010 • Intel (RK80532PG0881M) Pentium 4, 3 GHz...
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1801 microcode patch erro
http://admin.utep.edu/Default.aspx?tabid=56

Try downloading the 815 motherboard drivers on the right side of the page.
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1801 Microcode Patch Error
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