For the past 2 weeks (approximately), when I click "Shut Down" on my Win 8 laptop, nothing happens. If I click "Sleep," it goes to sleep right away, but it will not shut down. I see by the forum posts that my problem isn't unique. I have tried all three methods described in the post: http://answers.microsoft.com/en-us/windows/forum/windows8_1-performance/windows-81-wont-shut-down-or-go-to-sleep/4171fb86-65f2-41aa-ab80-40559dbe1010 - (by Rajesh Govind) - all to no avail. I have also tried Power Options > Choose what the power buttons do and unchecked Turn on fast start up as other posts have suggested. In Method 2 described in the post above, I ran sfc /scannow and ended up with the following result: Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in C:/Windows/Logs/CBS/cbs.log. (I tried to attach the file but it's 15MB, too large). My Win 8 machine is new (only a few months old) and my system specs are attached also. It was shutting down fine, I have a feeling this happened during a Windows Update.