error: Cannot run compiler 'g++'. Output:

[sierdzio]

OK, go back to Qt Maintenance Tool, and add MinGW 64 bit (it's in Tools section if I remember it well, near where Qt Creator is). Also, while you're at it, update to Qt 5.12.1, it's a much better release.

[ashajg]

ok thanks I ll do it..

[ashajg]

hi @sierdzio

MinGW7.3.0 64 is already installed

[sierdzio]

Hm, then it should just work :/ Try reinstalling perhaps?

[ashajg]

Its the second time I reinstalled it...
Is it because of environment variables or something...?

[sierdzio]

No idea, sorry.

[SGaist]

Hi,

Did you try to install both 32 and 64 bit versions ?

There might have been an error in the installer text.

[ashajg]

@SGaist I ll try installing Mingw 7.3.o 32-bit and 64 bit both..

[SGaist]

At the same time ?

[ashajg]

hi guys finally I got success in installing Qt on my PC
Just created new folder and installed all versions of MinGW from Developer and Designer Tools and its working now.. Thanks for help :)