Desktop access to very slow

The system previously used quickly into the desktop, then re-done system, the speed on the very slow, especially from the desktop background has been shown to the Show Desktop icon in this period is too long.I have done some optimization, but no Effect.Is not some slow system, some system fast? Really anxious people!

good system and I boot the system very quickly what is loading your system? you may have installed the system in question
Or load too many things that had led to the slow start
unnecessary to remove the item, find out whether there are 360 rogue malicious software.