I have installed Microsoft Security Essentials on mine Windows XP system. But when I updating I got this error: “Error code: 0x80070426 “. I'm hoping someone out there definitely hanging trying to help. I have tried to uninstall the all third party programs. If you have the error code, you can search the community for this or pass this along to the Support Team. Microsoft Security Essentials was not able verify for virus & spyware definition updates. I have tried lots threads but I didn’t have the any suggestion on this. So therefore can anyone suggest on this and so that I can solve mine issue.