On Tuesday, Microsoft released a large number of security bulletins for newly discovered vulnerabilities.  All home & corporate users should promptly update their systems:

http://technet.microsoft.com/en-us/security/bulletin/MS15-AUG

https://isc.sans.edu/forums/diary/August+2015+Microsoft+Patch+Tuesday/20023/

Today we released security updates to provide protections against malicious attackers. As a best practice, we encourage customers to apply security updates as soon as they are released. More information about this month’s security updates and advisories can be found in the Security TechNet Library.