My keyboard stops working properly: for instance, if I type the 'D' key, actually Windows understands ALT+D. Any key I type is interpreted as this key plus ALT. Usually, when this happens, I reboot the machine and it goes back to work normally. What is happening here?
keyboard - How to avoid sticky ALT key on Windows 11 - Super User
The keyboard shortcut that enabled this was to hold the right shift key for eight seconds, something that a cat could easily do. What it did was not disable the keyboard, but enable filter keys, an adaptation designed for people with Parkinsons or the equivalent who hit keys multiple times when they only want to hit once.
The basic Italian keyboard layout as shipped with Windows 7 has no way of typing the backtick (`) or the tilde (~). I checked this using Microsoft Keyboard Layout Creator (MSKLC), with that layout loaded into it. I presume that this layout is more or less standard in Italy, though of course Microsoft might have its own oddities here. However, in Windows 7, there is a somewhat different layout ...
5 Depending on your keyboard layout, there might be an AltGr key on the on-screen keyboard. Type osk into the search box on the taskbar and then choose "On-Screen Keyboard" from the choices that appear. With AltGr pressed, the € symbol appears in the top row for me (UK keyboard layout) but not sure where it would appear in other layouts.
How to type the Euro Symbol € on US English keyboard in Windows 10 ...
After having added a second keyboard layout to Windows, I wanted to turn off its hotkeys to switch between them, like Left Alt+Shift, and Ctrl+Shift. I knew about the Text Services and Input Languages dialog but in my current version of Windows 10 (1909, build 18363.1082), I simply couldn't find it.