Windows 10: My left shift key isn't working, how do I fix it?

My left shift key always turns on and off, sometimes it works, and sometimes it doesn't. However, my right shift key works, a long with all the other keys on my keyboard. I tried restarting my laptop, and troubleshooting, and I don't want to restart my whole laptop because then it'll delete all my important apps.

:)

 

Printer isn´t working after latest update.

After the latest update from Windows, my Canon Pixma ip6600 printer isnt working. In Device Manager it shows up as working properly but when I go to print it isn´t listed as an option in any programs. Troubleshoot suggests it´s a USB 2 printer on a USB
3 port and that that´s the problem but that cant be since it worked fine before the update. I´ve tried to uninstall and plug it back in but that doesn´t work either.

 

Some Keys (T,Y,Backspace,Shift) Not Working Lenovo

Some keys like t,y,backspace, shift, caps lock on the left, numlock not working.

i am running win8.1 and i cant use the keyboard troubleshooter as i saw in other forums

fix

 

Windows + Shift + right doesn't shift window to the right screen (shifting to the left works fine)

When I use Windows Key + Shift + left the active window jumps to the monitor on the left like expected
But when I try to do it the other way around: Windows Key + Shift + right the window doesn't jump back to the right Nothing happens. Why? How can I fix this?

PS: I am using Windows 10 Version 1903 (64 bit) on my ThinkPad with two additional external monitors.
Windows Key + right moves the window correctly to the right (step by step but not directly to the next monitor).
Maybe the Windows Key + Shift + right was overwritten by something else? How can I find out?