1.手動安裝了 Windows8.1-KB2919442-x64html
2.手動下載 KB2919355微信
更新成功3d
Turns out to have been a result of a USB Restriction GPO which locked down permissions to USBSTOR.sys, which KB2919355 has to update, and fails if it can't. Once we remediated the policy on the machine and restored the correct permissions to the file, the update went through just fine.rest