When the user tries to launch a game, the following error message appears 
 
 on the screen and the trophy data may disappear; “Failed to install 
 
 trophies. While theories abound that this has something to do with the calendar on older PS3s (some users are reporting their date/time settings have been reset), bear in mind Sony has redesigned its PlayStation website over the weekend, so it could be the result of some tinkering under the hood for the PlayStation Network. Then again, if consoles not connected to the PSN are also affected, it could be something else. We hope to resolve this problem within the next 24 hours.
– Sony is advising many PS3 owners not to use their consoles for 24 hours while the company fixes a massive bug affecting consoles around the world. Older versions of the system have been unable to log on to the Playstation Network, and in some cases even unable to play games, thanks to a quirk in the system’s clock. Developers tell Kotaku their PS3s have fallen into “a rebooting cycle, due to an endlessly-looping error message.” “Rest assured, we’ve many people working on fixing this issue,” Sony’s European arm tweeted this morning. The company later released a full statement outlining the problems, which you can read here. The bug affects only the older, “fat” versions of the system, not the newer “PS3 Slim,” the company is quick to point out.