Hi. I have tried to Install Microsoft Security Essentials but I get the error 0x80070643. I unistalled Avira first, then rebooted before trying. Please help !
In the File name box, type LoggingOff.reg, click All Files in the Save as type list, and then click Save.
On the desktop, double-click the LoggingOff.reg file to remove the registry values from the Windows registry.
Click OK in the message box.
Delete the LoggingOn.reg and LoggingOff.reg files from the desktop
Contact Microsoft Support for help, and reference this Microsoft Knowledge Base article when you speak to the support agent. For more information about how to contact Microsoft Support, visit the following Microsoft Web site: Contact Us (Contact Us)