Recently a Vulnerability was found in Adobe Flash Player, Google has fixed this vulnerability secretly for its browser, Adobe has confirm that they will soon release a patch which will fix it.
Actually Google keeps running it update in the background and if any update is found it downloads and install it and that update will be run from next startup.
If you are using latest version of then you don’t have to fear anything.
On the other hand Adobe had said that they will launch patch very soon for its product.
This will affect your windows machine when a affected Excel file is opened, though Microsoft has confirmed that MS Office 2010.