Error when starting Word & Excel

Hi all,

I am able to successfully open word docs, but I consistently get this error:
[IMG]http://tiferes.co.il/wp-content/uploads/2013/08/image.png[/IMG]

Does anyone know how to fix this?

I am also asked to sign in every time I open Word or Excel:  
[IMG]http://tiferes.co.il/wp-content/uploads/2013/08/image-1.png[/IMG]

Does anyone know how to fix these problems?


Windows 7 64 bit, Home Premium, SP1.  Word & Excel 2013