Microsoft's decision to dub their next OS Windows Vista doesn't seem like a wise choice.

Two days after the official "baptizing", when Longhorn became Windows Vista, a company of Internet services from Seattle announced that it owns the trademark for the name Vista, today, two other companies have joined the list of those offended by Microsoft's new OS name.

VistA Software Alliance and WorldVista are two non-profit associations that provide the VistA electronic health record system.

"The confusion created by Microsoft and its choice of the word 'Vista' is an affront to the people who take care of our nation's veterans," Barbara Boykin, chairman of the VistA Software Alliance said in a press statement.

Maury Pepper, Chairman of WorldVistA, has also showed her discontent, describing Microsoft's decision as being "unfortunate".

The accusations are somehow ungrounded, because Microsoft is not planning on using the name Vista, its OS being called Windows Vista, but at first, there will still be some confusions.

In any case, Microsoft doesn't seem willing to give up on the chosen name, hence, we might witness some lawsuits related to the right to use the name Vista.