Hi I had Windows 7 on Inspiron E1505, it was getting slow So I installed clean Windows 8.1.

But even after installing Windows 8.1 I see sometimes CPU usage go over 90%. But CPU and Disk usage come back to around 50% after sometime. I see usage shoots to 90% when I open new tab in chrome or IE. 

Most of the CPU and Disk is used by Chrome, System, Service Host: Local Services / Network Restricated.

Is this normal behavior?

I also feel like its getting overheated, I cleaned fan though.