Hi Gabrio,
Is your Wi-Fi adapter's driver up to date? Might want to see if there's a most recent driver.
Also, please download, install and run
Xirrus Wi-Fi Inspector from your computer. Double click the Xirrus Icon on your Desktop, Tap the Printscreen key on your keyboard, open up Paint then choose Edit from the Menu and select Paste, then SAVE it. Upload and attached the file here.