Open Steam by double-clicking its entry on the Desktop or by searching for it in the Start menu.It’s a strange problem as this overlay is sometimes quite useful for in-game features but you might want to consider disabling it for the current version of Steam.
Users have experienced that the process’ CPU usage increases vastly when running a game and they managed to figure out that the culprit was Steam Overlay. There is something about Steam Overlay which causes high CPU usage by Steam Client Bootstrapper. Even though the problem has since been resolved, the spyware may have remained and it gathers data while causing high CPU usage by Steam Client Bootstrapper. It’s a weird fix but it has worked for plenty of users! However, it appears that even Steam itself struggles because of this overlay so make sure you disable it.
