Hi everyone!
I recently upgraded to Windows 10 x64 (fresh install).

Before the upgrade, QTCreator 3.5.1 worked flawlessly, but now, most of the time when I right click on a function name in my code for example, the menu comes up after a long 5-10 seconds, and if I click on "Go to declaration", I have to wait another 5-10 seconds for QT to get me there.
If I just click on the function name and press F2, QtCreator still hangs.
Also, when copying text, Qt hangs for some seconds.
It is interesting to note that:

I have another PC, same OS, same Qt, same project, and I encounter the same problems
To be sure, I made a fresh install of win10 x64 on a virtual machine then installed QtCreator, I still have the same problems: it's therefore not related to any third party applications.
The problems do not happen on small projects (I do not encounter these problems with the sample projects provided with Qt)
Same issues with version 3.4.2

Thank you very much for any help, I'm this close to downgrading to Windows 8.1!