My computer's os is Windows 7 Pro 64
Best answer by JimM
I've just tested this on Win7 Pro 64 in a standard user account, and it's working for me. It makes me wonder if maybe you do not have a default browser selected in that account. Please check your browser's settings screen to see if Windows recognizes it as a default browser. Otherwise Windows will not know where to send the command to open a browser.
In Chrome, click the three horizontal lines, go to Settings, and check to see what "Default Browser" says towards the bottom of the screen.
In IE, this is found in the gear icon > Internet Options > Programs > Default web browser
In Firefox, this is found in the Firefox button > Options > Advanced > System Defaults > Make Firefox the default browser
Please let us know if selecting a default browser helps your situation.