If your machine appears to do something slowly it's not running slowly - it can't run slowly - it just appears to be going slow.
Slow responses are just a matter of too much going on - programmes running in the background hogging the CPU time - and disk transfers.
The CPU runs like a racing car and by comparison disk transfers like a trundling steam roller. The fewer disk transfers the faster the machine will respond.
Your machine may well be infected with malicious software (Malware) - reporting on what you do. This will slow it down - get rid of it by loadig and using - MalwareBytes (free) or Spybot (also free).
Make friends with Task Manager - you can see what processes are eating up CPU time and making your life a misery.
STOP things happening in your machine unless YOU want them to happen - be in-control.
Cookies?
Go here...
https://www.disconnect.me/
Watch both videos - speed up your browsing by as much as 27%.
Good luck...
Peccavi
August 2013