Reason 1: It could occur after Windows has installed a series of unexpected upgrades that it deems incompatible with the program distribution, or after you make a series of unexpected system settings changes.
Reason 2: It could also be related to the software you have installed on your computer.
Reason 3: It's possible that your hibernation files aren't correct or that your user profile is corrupt. This means that when your PC wakes up, it needs more time to load the window section from the hibernation file or your profile from the disc.
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