Anybody Needing More Security for Their Windows OS Pc, here are Two that are Updated Constantly and are FREE :

Code:
https://www.microsoft.com/security/scanner/en-us/default.aspx
Code:
https://support.microsoft.com/en-us/kb/890830
Just Put in Your Operating System Version and the Right Bit(32 or 64) Number, Down Load, Open and Run...!

As with Anything from the internet, if Doubtful, Scan before Opening with a Virus Scanner, Malware Detector and or MSE to bee Safe...! Just Find where They Down Load at, Right Click and Choose with what You want to Scan Them with...!

When You get Them Loaded and They Finish and You are Happy with the results, just Bookmark Them and put them at the Beginning of Your Bookmarks so They are always at the Ready...!