It sounds like Programs that are starting at boot that do not need to
Have look in this. Type in the Run Box
MSCONFIG press enter, go to Startup Tab have a look at the Programs that have a tick in the box. Write down what your not sure about and check it in Google to see what it does, and if you can remove the tick. If you remove any ticks from boxes write down what you remove, do not do too many at one reboot if it boots okay put a tick in the box that pops up before closing it. If you cannot boot after removing ticks, start in Safe Mode by tapping F5 as its booting and put the ticks back that are stopping it booting.
You could also use CleanUp to remove junk from your Drive. i have used this on all my computers for years without problems click here