Microsoft Security Client Error Home › Forums › System Ninja Support › Microsoft Security Client Error This topic has 2 replies, 2 voices, and was last updated 12 years, 6 months ago by Shane Gowland. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts October 17, 2012 at 10:58 am #7961 Shane GowlandKeymaster Step 1: If you’re running Microsoft Security Essentials, fully uninstall it. Step 2: Reboot your computer and run this tool from the Microsoft website. Step 3: Reboot again, if the error persists let us know. October 17, 2012 at 10:58 am #7962 Shane GowlandKeymaster If you uninstalled MSE, make sure you re-install it again later. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In