CPU occupancy rate of the strange phenomenon

Recently, the system felt a little slow, all the windows are closed, only the desktop and open Task Manager, CPU utilization rates remain at 50-60%.List, but look at the process, not the process of high CPU utilization rate of only 95 in the IDLE About.IDLE said that the higher the reasonable, CPU, the lower utilization rate.
This is the first strange, strange thing is, if this time to open an IE window, CPU occupancy rate of decline in an instant, to maintain 1-10% of normal Level.How a more open process, CPU utilization will be low???

(Defender killed by security AVG8.0360 drugs, checking and malicious Trojan horse software, all normal.)

Zehui Shi it in the end?

Really strange ……
If you can not determine the Trojans, viruses, rogue software.That system had re-try.Really strange.Antivirus software is not omnipotent.Is your computer's time for a long time, hidden inside to start the project too much.

That there is no way of the clean-up, you can get Pieces of good points about re-disk system.

I like this, 10 minutes, the system will be re-finished.All of the normal.There may be unknown background services running as automatic idle disk optimization Look at the process of setting a list of the number of
process we are generally 17-18