Η Google has just released a new stable version of Chrome (47.0.2526.73), trying to fix several security issues.
The new update available from the fixed channel in Chrome The programmers of Google managed to repair multiple problems of the previous stable version (41 repairs security).
For more details, you can see it release note of the fixed version 47.
So if you use the program browsing, you should automatically receive the update.
Alternatively, visit the address chrome: // chrome in the older version of Chrome you use and update from there.
You can download Google Chrôme for Windows (and not only) from here.