解决办法:在管理员权限下的CMD下输入:
SC config wuauserv start= auto
SC config bits start= auto
SC config cryptsvc start= auto
SC config trustedinstaller start= auto
参考资料:https://answers.microsoft.com/en-us/windows/forum/windows_10-update/error-0x80070bc2-when-windows-10-update-trying-to/ba4053f2-acec-43db-9305-bca3cc2b8b0c