Microsoft does have a tester program for Windows 10, but it's hidden. The Windows 10 System Requirements page says that if you are  ... running Windows 7 SP1 or Windows 8.1 Update, you can check to see if it meets the requirements by using âCheck my PCâ in the Get Windows 10 app..
Signs and symptoms of anxiety may be physical (racing heart, shortness of breath, sweating), emotional (panic, feeling worried, stress), behavioral (nervous habits, compulsions), and cognitive (racing thoughts, worries, obsessions).
It's well known that anxiety can cause heart palpitations, and it's believed that the main cause may be an over-awareness of one's own heart, combined with surges of adrenaline that may occur at random in those with anxiety. These types of palpitations often trigger panic attacks.