Microsoft Security Essentials Upgrade Error 0X80070645 Fixed
When you are prompted to upgrade to Microsoft Security Essentials, the upgrade is not installed and you receive the error message 0x80070645. If your PC has 0x80070645, you must take immediate action against the error. 0x80070645 is not the kind of computer problem that will go away on its own. You must remove it as soon as possible to avoid further damage to your system. In most cases, 0x80070645 is a devastating computer problem that must be solved as quickly as possible.
To solve this problem, you must run one of the following solutions:
CCNA, Web Developer, PC Troubleshooter
I am a computer enthusiast and a practicing IT Professional. I have years of experience behind me in computer programming, hardware troubleshooting and repair. I specialise in Web Development and Database Design. I also have a CCNA certification for Network Design and Troubleshooting.