When I try to start service "Windows Process Activation Service", I get Error 30: The system cannot read from the specified device.
Try to find Error 30 in Google、Baidu,get nothing.
P.S: "C:\inetpub\temp\appPools" is exist, and I give it all permission.
Finally!!!! I get it done!
Find a normal computer(WAS Service is running), backup "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WAS", then back to your computer.
run cmd in Admin Mode, run"sc delete WAS".
run "sc create WAS binpath="c:\windows\system32\svchost.exe -k iissvcs" DisplayName="Windows Process Activation Service" type=share error=normal start=delayed-auto depend=RPCSS".
Restore the registry with your backup.
Start WAS Service!