HP laptop is 2 yrs old. It would not shutdown and I had to unplug power supply. When restarting the laptop it took over a half hr. to start up. This problem has happened several times. Consequently it is running extremely slow. Prior to this happening the laptop was running ok. Something is messed up. The Webroot anywhere software doesn’t find anything wrong, nor does Gary software program. Any Ideas as to what deeds to be done to restore it to running fast.