api-ms-win-core-profile-l1-1-0.dll is an important file of the Microsoft Windows kernel, the core of the operating system. api-ms-win-core-profile-l1-1-0.dll is part of the new kernel architecture Microsoft has introduced for Windows 7, where DLL file names start with api-ms-win-core, followed by the functions category name.
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Non-system processes like api-ms-win-core-profile-l1-1-0.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that over time your registry suffers fragmentation and accumulates invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues