Default sketch working but arduino is not recognizing I have an arduino UNO and when I connected the device through the USB to the PC (with windows 7 64 bit),

The default blinking sketch, which comes shipped with it, is working, 

but the device recognition sound is not playing.

and the device driver installation dialog never appeared and no arduino entry in the device manager.

And when I tried to upload a successfully compiled sketch from the ide 1.8.4 , 

It just says, 'problem uploading to board'
More verbosely, ' avrdude: can't open device""\.\COM1": the system cannot find the file specified'

The device is getting power and running the sketch,
But device is not recognized, maybe it is connected charge only, can I install the drivers manually?

Thanks in advance for any help.
Hahaha! I figured it out! The USB connector on the board's side was loose connected! It didn't felt like more pressable &amp; when I pressed it enough, it firmly fitted.

When it loose connected, the board connects power only.

The drivers were installed automatically &amp; it showed under COM6. I've got sketches running in no time.
I' ve tried a lot of knight rider patterns with a bunch of RGB LEDs then ;-)

Thank you @Majenko and the arduino stack exchage for your kind replies.