Bootcamp function key problem, suddenly

Amazing! It helped. So thank you for that advice! 🙂

It's particularly interesting, since the Apple guide on the SMC Reset doesn't mention funcion keys at all and don't mention BootCamp issues.

The function keys in the subtitling program now work as before. What still doesn't work like before is that the function keys for sound up/down/off and brightness up/down - that used to work when I held down the fn key - don't work now. But I can live with that, so thanks again!!!

Well, I install Windows updates manually, and only those that are called "important" by Microsoft. If I were to unistall one or more, I wouldn't know which ones, and I wouldn't know what would be the effect. I recently installed three windows updates plus an Acrobat Reader update.

Yes, the keyboard setting (check mark on/off) remains after restart. But strangely, it doesn't seem to have any effect on the behavior of the function keys. The only one that seems to work normally is F3, which initiates a search - on the desktop it searches the computer, in Chrome it searches the webpage.

In the subtitling program that I use, F3, F4, F5, F13, F15, F18 and F19 work alone. F1, F2, F7, F8, F9, F10, F11 and F12 only work if I hold down the fn key. The remainder of the F-keys don't have any function assigned to them.

Okay. Still doesn't explain why the F keys changed behavior all of a sudden.

My mistake that I didnt create a restore point earlier. I think I might have disabled it at some point because - as I remember - it was a continuous process that kept gobbling up more and more of my harddisk.

But as I said, I can live with it as it is. There are other ways to control brightness and sound.

Thanks again for your helpful answers and interest in my problems.

Unfortunately, I don't have Word for Windows. In Open Office, most F keys work, but some of them don't with the fn key depressed. Others do. Before this issue arose, depressing the fn key somehow opened up a different set of functions - outside of the particular program that was open - allowing for the brightness and sound functions like in OSX.

The second SMC reset didn't make difference. Re-installing BC drivers was actually the first thing i tried, But like - many others, judging from a Google sesarch - I ran into a probeelm when the process asked for "BootCamp64.msi". It is nowhere on my computer and can't be found on the internet. I tried to download other BootCamp updates, but nothing helped, and there was no way to update BootCamp.

It says Apple Keyboard, and that it's functioning properly. It hasn't been changed since I installed BootCamp. (I don't know, though, why Apple Keyboard is listed twice.)

Okay. This is what it looks like.

If I apply the Boot Camp Support Software 5.1.5621, and then use a Windows restore point from before this new BootCamp installation, will Windows revert to what it was before this BootCamp update?