You are a brave man. If SWMBO (She Who Must Be Obeyed) finds out you have been messing with her machine you will be in serious trouble, particularly if it goes wrong and the repairman says it has linux on it. (Perhaps you could arrange for some pictures of what she does to you......)
Suggestion - ask SWMBO for a user account, password protect it. Now install Virtual Box with the guest extentions, and install one of the lighter weight installs, LXDE or XFCE.
Now if the machine goes wrong there will be minimal traces of your linux preference and you will survive any repercussions.