Windows Search is accent-sensitive in Spanish. This is unconfortible because if you don't put the accent of a program name or setting the Windows Search is not able to find it.
Due to it is awkard to put accent when you need to search something fast, it is not case-sensitive and any of the search engines have this issue. I think this might be deleted from the Windows Search. When you cannot find your application or setting you are looking for, it seems it is something wrong with the Search.