Hi Patrizia,

So I guess you see something like this:

This is the keyboard activation of the ribbon commands as Nora points out.  Normally you activate this by pressing the Alt key first and then whatever letter relates to the ribbon group commands to get the next level like this.  So here I pressed Alt +H to get this.  Studio 2011 doesn't have this capability so you would never see this effect.

It does seem as though something is clashing on your keyboard causing your Alt commands to become activated.  I think the best thing to do is log a support ticket and perhaps one of the support engineers will be able to figure out where the problem is coming from on your computer.

Go to the Knowledgebase;

http://kb.sdl.com

Then go to the tab called Solution Finder and now go here;

Download & Installation Problems
- I use SDL Trados Studio and/or SDL MultiTerm 2009, 2011, 2014 or 2015
-- The installation went fine but now I get an error message etc
--- The problem occurs in (pick the appropriate tool/s)
---- None of the articles resolved my problem (if they didn’t!)

Follow the route for your problem and if there is no answer that helps by the time you get to the end you'll be presented with a form to contact support. Complete all the fields in the form making sure your email address is entered correctly or nobody will be able to get back in touch with you.

Also use the Chrome browser to log the case if you have it; you'll get more success in completing the form.

Regards

Paul