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).
In brief: Sinus arrhythimia. This is the kind of heart arrhythmia that anxiety can cause and is a normal heart beat that happens to be irregular in timing. The high rate is similar to when you exercise. Since heart is pumping normally during sinus arrhythmia, it is harmless (other than causing more anxiety). Also, they tend to be short and self-limited, especially if anxiety is relieved. This is the kind of heart arrhythmia that anxiety can cause and is a normal heart beat that happens to be irregular in timing.