What is this:
Whenever things go awry, you'll have to look-out for him/her/it, and he/she/it may help you.
The first picture shows Dhanush, the singer of the viral youtube video song "Kolaveri Di". Dig deeper and you'll find the answer.
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The answer might be
THREE (The song "Kolaveri Di" is from a Tamil psychological thriller film called "3".)
FINGER (potato fingers)
KEYS (piano keys)
1. According to https://en.wikipedia.org/wiki/Three-finger_salute, "Three-finger salute" is a jocular term for the three-key command Control-Alt-Delete.
2. Whenever things go awry with my PC, I reboot it by Control-Alt-Delete.
3. Control-Alt-Delete came up in the 1980s with the MS-DOS operating system.
Partial answer here as I can't figure out any more of it.
First image might refer to... CONFIRMED
Three, from 3, the movie that "Why This Kolaveri Di" features in.
Second image could be...
Fries, McDonalds, M, french fries
Third may be...
Hitler, heil, leader, Third Reich, Fuhrer
Fourth may be...
Piano, keys, ivory, keyboard