With my laptop, the L no longer works at times.
I can't imagine that it's because of dirt in the keyboard,
because then the big L would not work either.
Do I hold e.g. Hold down the s, then press the l, it will display the letter probemLos.
What could that be?
Do I understand correctly, if you press Shift + l does the L not work, if you only press l alone?
Yes exactly! Even if I write the s and l in quick succession, it works. Now, for example, the little l works again permanently for a while.
Ok, then it can't really be a software problem. Apparently the keyboard tracks are damaged or something. But I've never had anything like that. Do you have an external keyboard to connect and test?
Otherwise you'll have to swap the keyboard. Which laptop do you have?
An MSI. Sometimes I'll take it apart and clean it, maybe something will help.
The manufacturer doesn't really bring me much, but I don't think cleaning will help either. Of course you can try it
Maybe this is actually a stupid software bug. You can boot Linux or something live via a USB stick. Do not install, then all data will be overwritten. If the live doesn't work.
If the keyboard works on Linux or whatever you're trying to use, you may need to reinstall Windows.
Well, believe it or not, yesterday I got a laptop that had a similar problem. If you want to write ß you have to hold the letter and then go to delete. Then he writes the letter.
With the laptop, the problem was probably caused by tea. It was spilled on the keyboard. I'll try to wash the keyboard and otherwise clean it, but I suspect that it won't work. You can hardly do anything with laptop keyboards.