Disable searchprotocolhost.exe high cpu

I has found that Searchprotocolhost.exe in Windows 7 is running all of the time and uses high cpu or memory, such as using up to 36% of CPU. searchprotocolhost.exe is slowing down my old computer.

what is Searchprotocolhost.exe? It is Windows Search Protocol Host which is created by Microsoft Corporation and located in the C:\Windows\System32 folder.

How to safely disable searchprotocolhost.exe or stop searchprotocolhost running?

Type services into the search box and press enter
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Double-click the Services(Local)
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look for Windows Search
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Right-click it
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choose properties
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click stop.  Change startup type to disable then click apply.