Have you attempted to do the Windows Update again? Or update/run the antivirus? If not, please try both. I'd like to do the following: Please run the MGA Diagnostics tool You will be prompted to either “Run” or “Save” the tool. Choose to “Run” the tool and follow the on-screen prompts. You will receive an Internet Explorer-Security Warning dialog box for the Windows Genuine Advantage Diagnostic Tool> You must choose to Run this tool when prompted. Once you are presented with the Diagnostics tool choose Continue to run the diagnostic report. If the RESOLVE button is available after running the diagnostics, please click RESOLVE to allow the diagnostic tool to attempt a repair. After running the MGA Diagnostic tool, click on the Windows tab and then click on Copy Please return to this thread and Paste the results here for review. ------------------------------------------ This tool will is to look on the computer itself, in the documentation you received with the computer or with your retail purchase of Windows to see if you have a Certificate of Authenticity (COA). If you have one, tell us about the COA. Tell us: 1. What edition of Windows XP is it for, Home, Pro, or Media Center, or another version of Windows? 2. Does it read "OEM Software" or "OEM Product" in black lettering? 3. Or, does it have the computer manufacturer's name in black lettering? 4. DO NOT post the Product Key. NOTE: The data collected with the Genuine Diagnostics Tool does NOT contain any information that can personally identify you and can be fully reviewed, by you, before being posted.