The process of wiping out the unwanted items is very difficult and will sometimes harm the performance of PC. When this happens, the training course has to search more CENTRAL PROCESSING UNIT cycles to get these items and hence, it will take longer time to accomplish its activity. One of the main reasons is because you could have un-installed program, programs and other elements through your previous system.
There are several reasons for which you are suffering from high PROCESSOR utilization or perhaps high disk utilization in Windows.