Application Pool stopped ,but can not start

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setup

Hi there,

I have a issue need your help.
My test server is windows server 2008 R2.
After I installed the IIS ,but the IIS application pools are not started,all application pools status are stopped.

When I right click it to start,it displays "Application pools cannot be started unless the Windows Process Activation Service(WAS)is running".

After then I go to service to started it,but it displays
"Windows could not start the Windows Process Activation Service service on xxxx,Error 2:The system cannot find the file specified."

And I check the dependencies services:
World Wide Web Publishing Service,
Net.Msmq Listener Adapter,
Net.Pipe Listener Adapter,
Net.Tcp Listener Adapter,

are all not started,the Startup type is "Automatic",when I start these services,all display:
"Windows could not start the XXXXXXXX service on XXXXXXX, Error 1068: The dependency service or group failed to start"

At last ,I uninstall the IIS reboot server and re-install the IIS several times,but the IIS Application Pools are also stopped.
The error situation also.

My server is to used as sharepoint server,before I have unintalled the Sharepoint production.

Can anyone help me?

Thank you very very very much.