user29602: I bought an Arduino UNO R3 Yesterday. It's a Chinese clone. But it has the Atmega328p and MEGA16U2 both.
I've installed the IDE fully. But it can't find the ports. The Tools > Ports option is greyd out, Cannot find The options Named "Ports (COM & LPT)" or "Other Devices" in device manager. Can't upload any sketch to board.
I tried this on my both Win7 SP1(32 BIT) & Win10, which are installed in the same pc but in different partitions. I've roamed accross stackexchange but no successful result.

user-1: You may not have installed the drivers when installing the IDE. The only way I know to reinstall the drivers is to reinstall the IDE and make sure when you get to this screen you tick every box:

Otherwise you may not have selected your board correctly. To select your board in the IDE, go to Tools > Board > Arduino Uno/Genuino Uno
Your port select may then appear, it should be COM1 or something similar. If you have multiple, just try them all by selecting one and then upload a sketch to it. The Arduino Uno should flash some lights if it worked correctly. 


29602: <p>I bought an Arduino UNO R3 Yesterday. It's a Chinese clone. But it has the Atmega328p and MEGA16U2 both.
I've installed the IDE fully. But it can't find the ports. The Tools > Ports option is greyd out, Cannot find The options Named "Ports (COM &amp; LPT)" or "Other Devices" in device manager. Can't upload any sketch to board.
I tried this on my both Win7 SP1(32 BIT) &amp; Win10, which are installed in the same pc but in different partitions. I've roamed accross stackexchange but no successful result.</p>
 -1: <p>You may not have installed the drivers when installing the IDE. The only way I know to reinstall the drivers is to reinstall the IDE and make sure when you get to this screen you tick every box:</p>

<p><a href="https://i.stack.imgur.com/XZnOo.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XZnOo.png" alt="Install Arduino"></a></p>

<p>Otherwise you may not have selected your board correctly. To select your board in the IDE, go to Tools > Board > Arduino Uno/Genuino Uno</p>

<p>Your port select may then appear, it should be COM1 or something similar. If you have multiple, just try them all by selecting one and then upload a sketch to it. The Arduino Uno should flash some lights if it worked correctly. </p>

<p><a href="https://i.stack.imgur.com/THbiI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/THbiI.png" alt="Board"></a></p>
