Original title: Is there a way to change the registry permissions or do I have to burn a CD with defender on it to fix the PC?Hi- Have contracted a Jump/redirect virus and/or what looks like a conflicker. Awhile ago all my system resore points were deleted. There is a Registry permission problem that will not let me install Defender or Security Essentials. "One Care" ran but did not resolve the problem. Here are two files that have had permissions changed and could be the cause of the Defender and Security Essentials download problems:Ran Symantec W32.Downadup Removal Tool 1.1.0.2ERROR: Can't change ACL/permissions for file C:\Documents and Settings\User\Local Settings\Application Data\Microsoft\CardSpace\CardSpaceSP2.db; file not scannedERROR: Can't change ACL/permissions for file C:\Documents and Settings\User\Local Settings\Application Data\Microsoft\CardSpace\CardSpaceSP2.db.shadow; file not scannedW32.Downadup has not been found on your computer.TIA, hondobud

Hi,Method 1. Sometimes the installed security program might not be just enough. Let us run the online virus scan and check. a. Follow the link below to run the free online scan:http://onecare.live.com/site/en-us/default.htmb. Run the Microsoft Malicious Removal Tool.Microsoft Malicious Removal Tool - 32 bithttp://www.microsoft.com/downloads/details.aspx?FamilyID=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=enMicrosoft Malicious Removal Tool - 64 bithttp://www.microsoft.com/downloads/details.aspx?FamilyId=585D2BDE-367F-495E-94E7-6349F4EFFC74&displaylang=enMethod 2. Set the computer to clean startup and then try installing the software and check.How to configure Windows XP to start in a "clean boot" statehttp://support.microsoft.com/kb/310353/en-us Note: After you have finished troubleshooting, follow the steps as explained in the article to reset the computer to start as usual.Hope this helps.Thanks and Regards:Shekhar S - Microsoft Support. Visit our Microsoft Answers Feedback Forum and let us know what you think. If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.