-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
-
×InformationNeed Windows 11 help?Check documents on compatibility, FAQs, upgrade information and available fixes.
Windows 11 Support Center. -
- HP Community
- Desktops
- Desktop Software and How To Questions
- How to fix "1801-Microcode Update Error" in a Compaq Evo D3D

Create an account on the HP Community to personalize your profile and ask a question
Your account also allows you to connect with HP support faster, access a personal dashboard to manage all of your devices in one place, view warranty information, case status and more.
Check out our WINDOWS 11 Support Center info about: OPTIMIZATION, KNOWN ISSUES, FAQs, VIDEOS AND MORE.
It has been a while since anyone has replied. Simply ask a new question if you would like to start the discussion again.
07-20-2022 12:15 PM
Product: Compaq Evo D3D
Operating System: Microsoft Windows XP
Hello, I recently changed hard drives in an old Compaq Evo D3D desktop and when I switched it on it gives me *1801-Microcode Patch Error* Missing or Invalid Processor Microcode Patch. Please contact Compaq Computer Corporation for a new Rom Bios to support the new Processor Stepping. The following are the properties of the CPU:
Processor / Chipset
- CPUIntel Pentium 4 2.53 GHz
- Data Bus Speed400 MHz
- Chipset TypeIntel 845G
- Processor SocketSocket 478
Cache Memory
- Installed SizeL2 cache - 512 KB Advanced Transfer Cache
- Cache Per Processor512 KB
- TypeL2 cache
- Per Processor Size512 KB
- Installed Size512 KB
RAM
- Memory Speed266 MHz
- Memory Specification CompliancePC2100
- TechnologyDDR SDRAM
- Installed Size256 MB
- Rated Memory Speed266 MHz
Graphics Controller
- Form Factor
- integrated
- Interface Type
- AGP 4x
- Graphics Processor
- Intel Extreme Graphics shared video memory (UMA)
- Video Interfaces
- VGA
Mainboard
- Processor SocketSocket 478
- Data Bus Speed400 MHz
- Chipset TypeIntel 845G
How do I resolve the issue?
Be alert for scammers posting fake support phone numbers and/or email addresses on the community.
If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation.
Didn't find what you were looking for?
Ask the community
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.