Caps Lock acting as Alt-F4

[Venusy]

As you can probably tell from the topic title, my keyboard's Caps Lock button keeps acting as the Alt-F4 button combo. This affects all applications, and is extremely annoying, as I normally prefer to use the Caps Lock button over the Shift key. My keyboard is a Microsoft Wireless Photo Keyboard, and I've already tried restoring it to the default settings. Anyone have any advice?

EDIT: After a stupid attempt to fix the problem (by pulling the wireless reciever out of the PS/2 port), which caused my PC to lock up, and a restart, it now works properly. Seeing as how this is the third time this has happened, I'm going to guess it's a fault in the keyboard itself. I'm looking for updated drivers now.

[theisz]

That sounds like your caps lock key has been remapped.  Have you recently scanned for viruses?  I have heard that there are Trojans that can do this, but I cannot seem to find out for sure if this is true.

[Nec]

I had that happen to me two days ago with my USB keyboard. It kept changing all the keys and opening the "search for files and folders", minimizing my game, muting the sound, killed all my hotkeys for my media player. It ended up being an undetectable trojan packed in a .rar file located in C:\Documents and Settings\All Users\Application Data called "Tray Shim Bore Idle.rar" That has 2 .exe files in it, but I can't remember the name (I think one was called bleh 32.exe). There was also a Tray Shim Bore folder in my user account's Application Data folder. You have to have hidden/system files showing to find them. Deleting those (if you do have them) and running a registry cleaner should fix it. It is also posible they could be named something else. Good luck with it

[Gwill]

Wireless keyboards tend to get strange ideas some times.
Mine sometimes thinks it has the shift (or maybe it's the Ctrl) key stuck, causing all kinds of weirdness when I try to click on icons.  I can usually get out of that by hammering said keys a few times, even though they are not physically stuck.