not able to upload sketches

Here is the error

Arduino: 1.8.9 (Windows Store (Windows 10), Board: "Arduino/Genuino Uno"

Sketch uses 4432 bytes (13%) of program storage space. Maximum is 32256 bytes.
Global variables use 293 bytes (14%) of dynamic memory, leaving 1755 bytes for local variables. Maximum is 2048 bytes.
avrdude: ser_open(): can't set com-state for "\.\COM5"
An error occurred while uploading the sketch

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

The arduino is connected to COM5, in the tools section it even says COM5(Arduino Uno)

Try restarting your computer. Sometimes a glitch will cause the COM port to get stuck in an unusable state and restarting will fix that.

You may also be better dropping the APP version and going to the full installation of the IDE.
There are always a few reports about the APP version causing issues under some win 10 installs.
Quite often the fix is to change to the full IDE.