As I mentioned I don't want to re-install windows again , as I already installed so many applications and settings on current one.
Jackie Man
Clean boot is not factory reset.
Colleen Kayter
alonig1,
go ahead and do as Jackie Man suggests. Create a 2nd user profile and install Office 2013. You can give the 2nd user admin rights, make Office available to all users. If that works, you'll know the problem is in your primary profile, but you should be able to log in under your original ID and still use Office without any problem.
Have you tried a new user profile?