My Sony Vaio laptop model : VPCCA16FB with originally using Windows 7 operating system, then now I already upgraded it to Windows 10. All drivers are already installed for each device, everything is OK with this Windows 10 OS. The only problem is: when I switch the laptop on or restarting it, after vaio logo appears then it stuck with blank screen and it takes about 2 minutes. After that, then it continues to loading Windows. After I googling about the problem, I am not only the one, other people also have the similar problem with their laptops. The cause is in the Ultra Low Power State (ULPS) system. ULPS is a feature or mode in hardware (graphics card) designed to save power by reducing energy consumption to very low levels. Now the problem is solved. If you have the same or similar problem, maybe this below step will help you too.
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