Article ID: 326687 - View products that this article applies to.
This article was previously published under Q326687
When you upgrade your computer to Windows XP, you may receive an error message that is similar to one of the following:
C0000221 (Bad Image Checksum)
STOP: C0000221 - Bad Image Checksum in ModuleName
STOP: C0000221 - Bad Image Checksum. User32.dll is possibly corrupt. The header check sum does not match the computed check sum.
This issue may occur if any of the following conditions exist:
To resolve this behavior, use one of the following methods.
Method 1: Extract a New Copy of the User32.dll File from the Windows XP CDExtract a new copy of the User32.dll file from the Windows XP CD to the drive:\Windows\System32 folder on your hard disk, where drive is the drive on which Windows is installed:
Method 2: Remove or Replace the Faulty RAMRemove the memory modules that are installed in your computer, leaving enough RAM for the computer to start and run Windows. Restart the computer, and then run Setup again.
For additional information about Windows XP RAM requirements, click the following article number to view the article in the Microsoft Knowledge Base:
314865If the issue is not resolved, remove a different memory module. To identify the specific memory module that is not working correctly, you may have to restart your computer more than one time.
(http://support.microsoft.com/kb/314865/EN-US/ )System Requirements for Windows XP Operating Systems
For information about how to add and remove RAM to the computer, contact the manufacturer of the computer, or view the documentation that is included with your computer.
Method 3: Install Windows to a Different FolderNOTE: Before you install Windows to a different folder, first try the troubleshooting procedures in the following article in the Microsoft Knowledge Base:
310064If the issue is not resolved by using the troubleshooting procedures in 310064, install Windows to a different folder. For more information about how to do this, see the "Installing to a New Folder" section of the following article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/310064/EN-US/ )HOW TO: Troubleshoot Windows XP Setup Problems During Installation When You Upgrade from Windows 98 or Windows Me
(http://support.microsoft.com/kb/316941/EN-US/ )HOW TO: Install Windows XP
For additional information about how to troubleshoot "STOP: C0000221 error messages", click the article number below to view the article in the Microsoft Knowledge Base:
314474For additional information about upgrading to Windows XP, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/314474/EN-US/ )"STOP: C0000221 Unknown Hard Error" or "STOP: C0000221 STATUS_IMAGE_ CHECKSUM_MISMATCH" Error Message Occurs
316639For additional information about how to troubleshoot startup problems in Windows XP, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/316639/EN-US/ )HOW TO: Prepare to Upgrade Windows 98 or Windows Millennium Edition to Windows XP
308041For additional information about Windows XP Setup, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/308041/EN-US/ )Resources for Troubleshooting Startup Problems in Windows XP
(http://support.microsoft.com/kb/306824/EN-US/ )Release Notes for Windows XP Setup Contained in the Home.txt File
(http://support.microsoft.com/kb/286463/EN-US/ )Release Notes for Windows XP Setup Contained in the Pro.txt File
286647For information about how to contact your hardware manufacturer, visit the following Microsoft Web site:
(http://support.microsoft.com/kb/286647/EN-US/ )Windows XP Read1st.txt File Contents
http://support.microsoft.com/gp/vendorsMicrosoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.