How to unlock Windows Update ( also used to repair svchost.exe use 100% of your cpu)

Sometimes Windows Update freezes or fails to work properly.

To resolve this problem follow these steps:





1) open a shell DOS (use CMD as administrator).
2) run the following comamnds:

net stop wuauserv

attrib -r %systemroot%\SoftwareDistribution /S /D

rd /s /q %systemroot%\SoftwareDistribution

net start wuauserv

shutdown -r

I have used this solution to repair the problem when Windows Update run continuously the process svchost.exe and it use the 99% of your CPU.