Question of the Day #3

X has a habit of saying Y usually on events like a crash, unstable internet connection, lots of old browser cache and cookies taking up space, or when there is a lack of memory on the device.

X keeps reiterating to its friends and customers by asking them to double check if their data connection, hotspot, or internet connection is stable, or delete the user's cache, close other tabs or applications that are unwanted at the present moment, restarting the device or by updating the server.

X probably started saying Y due to the inspiration from the usage of Y especially in the 1520s, where this was used to exclaim to one's friend about a "sharp, quick movement" or sometimes a bite. Later, Y evolved into a way to express surprise, or misfortune and any unexpected outcomes.

The usage graph chart shows that when X started saying Y to denote misfortune, the entire world followed the trend.

Which two-word exclamation phrase, (2,4,!), Y and who/what is X?