Hello Nicolas Medina,
Thanks for reaching out here in the Microsoft Answers Community.
I have noticed that you have mentioned that pressing "T" opens Teams.
There is a shortcut to open Teams: either pressing the dedicated "Office" key and "T" (if you are using a keyboard with that key), or (more likely) pressing Windows+Ctrl+Shift+Alt+T. Other letters are used for other Microsoft 365 applications (like W for Word and X for excel).
It is likely something is holding the 4 keys (Windows+Ctrl+Shift+Alt). Check whether something is holding the keys in the bottom-left corner of your keyboard. If not, try using a different keyboard (or disabling the built-in keyboard in the device manager, if you are using a laptop).
It is also possible that certain third-party programs are simulating pressing the 4 keys. You can try performing a clean boot first to rule out the influence of third-party software, and see whether the issue persists.
To do so, right-click Start->Task manager. Go to the "Startup" tab, and disable all startup items. Then, press Windows+R and enter "msconfig". Go to the "Services" tab, select "Hide all Microsoft services", and then select "Disable all". Select Apply and reboot. See whether the issue persists.
Please refer to this support article for details, and how to pinpoint the application causing the issue.
Disclaimer: A "clean boot" starts Windows with a minimal set of drivers and startup programs.
It helps to determine whether a background service is interfering with your game or program and to isolate the cause of a problem.
These steps of "clean boot" might look complicated at first glance; however to avoid any trouble for you, please follow them in order and step-by-step, so that it will help you get back on track.
We look forward to your response.
Best Regards,
Sheng G. - MSFT | Microsoft Community Support Specialist