Eu tive o mesmo problema de saturação no meu HP Pavilion DV6 e encontrei esta resposta que funcionou perfeitamente para mim ..
Windows 7 100% CPU usage on H-P Dv6
Anyone experiencing maxed CPU usage by "search protocol host" and/or "permon", "indexing" on a H-P laptop, I suggest returning "Power Management" to "HP Recommended". It seems to cause some "loop" or conflict in the HP software. It is a simple fix, drove me crazy for weeks. But I have since duplicated the 100% cpu usage by another (foolish) attempt to manually manage the power settings. Hope this helps some of you.