@Theo_Sound @mgscoder @PearlsMusic
Thanks so much for your answers! 
Hi @rosssimpson !
After 2 days of tiring searches for the problem and a bunch of re-read articles on the Internet, I still solved the problem. One driver ( kb4019990 ) on the Windows 7 operating system was damaged. After reinstalling the driver, everything worked.
Hurrah! 
P.S. For the future, if someone (from authors) faces a similar problem, this is one way to solve it.
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