Disable Windows Search

1. Start
2. Control Panel
3. Administrative Tools
4. Services
5. Find Service named "Windows Search"
6. Stop service
7. Then Disable service
8. Ok your way out.

Reference:

http://answers.microsoft.com/en-us/windows/forum/windows_8-performance/microsoft-windows-search-filter-host-is-burning-my/bae4c974-5b47-4ab2-b17d-c599853f00f1

Scroll 3/4 way down or seach for "type services.msc"