Google Chrome was accidently marked as malware on Microsoft Security Essentials recently. It started deleting the browser from users’ computers.
Here is the fix from Google Chrome team. It gives to steps to correct the issue and re-install the program.
Â We are releasing an update that will automatically repair Chrome for affected users over the course of the next 24 hours. In the meantime, if you want to fix the problem with Microsoft Security Essentials and restore Chrome manually, please follow the instructions below.
Read the full set of instructions from Official Google Chrome Blog Here.