What shortcut keys are not used?

[Master Razor]

Some programs allow the usage of shortcut keys: binds a specific keyboard combination to a function of the program. However, most of the time, I end up overwriting one of the default shortcuts used in that program. I know that this depends on the program, but it's tedious to go through all of the used keys in the manual for something so simple.
I was wondering if anyone knew if there are specific combinations that are rarely used, if at all.

[illusive]

Mostly combinations of multiple control keys are never used except in some apps and tools in specific field that you're using. For example CTRL + ALT + any key is normally never used. But in media players like PotPlayer and VLC I use CTRL + ALT + ARROW to seek forward, backward and volume up/down. Your best bet is this wiki which contains what should be avoided to override in cross-platform matter.

[anon]

Ctrl+Alt+Shift+anything is rarely used Why is it okay to add shortcuts but not edit or even remove the default ones, anyway?

[qnr]

I like to use DefKey to check whether a specific shortcut key is already used by any (popular) applications, e.g. https://defkey.com/what-means/ctrl-e.

[JohnareyouOK]

AutoHotkey solves everything.

[sashiagustina]

what about windows logo + V ? anyone knows ?

[anon]

Does nothing on Windows 7, but apparently opens a clipboard history on 10.

[sashiagustina]

Does nothing on Windows 7, but apparently opens a clipboard history on 10.

Yeah you right very useful, could be very vulnerable

[GodDamn]

Scroll lock is definitely the unused shortcut key.

[anon]

That's used by some KVMs to switch between computers, but otherwise you're right. My laptop doesn't even have a status LED for it!

SysRq is another candidate. Linux uses it to trigger several low-level operations, but only as part of a combo and if that feature (Magic SysRq key) is enabled.