When you open Windows Explorer / File Explorer and you receive “Runtime Error in Explorer.exe” or “Windows explorer has stopped working” it could mean that you have ContextMenuHandlers which are malfunctioning
0x80072F8F is a very common error when attempting to activate Windows. The cause for the error “a security error occurred” is plain simple: the time on your system does not match the time on the activation servers” thus they block your access.
Troubleshooting KB2871690 KB2871690 is a security update for the core UEFI/Security components. The real cause for the KB to fail is unknown at this moment and only happens with particular OEM builds….