Hi. Ok I installed the SP2 via automatic update, and reset my PC. It got to the XP loading animation, but after this the screen stays blank until an error message pops up: --- lsass.exe - Bad Image The application or DLL C:\WINDOWS\system32\NTDSAPI.dll is not a valid windows image. Please check this against your installation diskette --- Alarmed, I reset. Same thing. Not knowing what to do I tried running in safe mode but again, stopped in the same place. After several vain attempts of trial and error I realised a different message came up- though I'm not sure if this is random or because I did something: --- lsass.exe - Application Error The application failed to initialize properly (0xc000001d). Click on OK to terminate the application --- Does anyone know what is wrong, or how I can find out? Is there any way I can fix this? Please help. Thanks

Sp 2 sets up a Restore point. Maybe this helps: How to start the System Restore tool at a command prompt in Windows XP Maybe this also applies to SP2: How To prepare for an SP1 installation (from M$) 1. If you use Faster User Switching, make sure that all other users are logged off from the computer and that only you are logged on to the computer; you must be logged on as an administrator. 2. In the event that the installation fails, you need to ensure that you get the most out of data recovery. On computers running Windows XP Professional, to maximize data retrieval, create an Automated System Recovery (ASR) before you begin installation. For detailed instructions, see "To create an Automated System Recovery set using Backup" or "To recover from a system failure using Automated System Recovery" in Windows XP Help and Support Center. 3. Perform a full backup of the files that you keep on your computer. 4. Stop any real-time virus checkers before you install SP1 because they might interfere with your installation. (Be sure to restart the virus checkers after you install SP1.) Check the space requirements for installing SP1 on your computer. See article Q326583, "Hard Disk Space Requirements for Windows XP Service Pack 1," in the Microsoft Knowledge Base. Important Automated System Recovery (ASR) will not restore your data files. For more information, see "Backing up files and folders," "Restoring files and folders," and "To create an Automated System Recovery set using Backup" in the Windows XP Help and Support Center. Caution Before you begin the installation, remember to perform a complete back up of all your files on your computer and close all open programs. ------------------- Release notes for Windows XP Service Pack 2 http://support.microsoft.com/default.aspx?scid=kb;en-us;835935&Product=winxp

Icefire: Microsoft has a toll-free number to use if you have problems with Service Pack 2, or any other update. it is: 1-866-727-2338 How to remove Windows XP Service Pack 2 from your computer; http://support.microsoft.com/default.aspx?scid=kb;en-us;875350&Product=winxp let us know how you recover...