This device is a corporate property and access to the company server is limited to my 'administrator' account, so creating a new account would cause an option.
I have consulted my IT department, and as you have suggested in your reply, they presumed that there could be some interferance between 3rd-party softwares and the windows 10 itself, causing this trouble.
But again, this is a corporate property and the softwares installed in this device is essential to the daily workflow, I think that the best solution is for me to get used to the taskbar at the bottom.
Thank you for your kind advice. I was surprised to receive such a quick reply.
Have a nice day,