If you want to speed up your Shut Down, there is a Tutorial
here
Just before Cleaning via CCleaner, run Disk Cleanup and Disk Defragmenter.
I would download and open
CCleaner and use
CCEnhancer for more features. Then go to the
Clean Tab,
Analyze and run the
Cleaner. Next go to
Tools (
NEVER GO TO REGISTRY) and select
Startup, select them all and select
Disable and then
Remove.
Then click on
CCleaner's Uninstall Tab and remove anything you don't need or use. Ask here if you are unsure if it is safe to remove or not, or you could
Google it.
Next, read these articles:
99 ways to Make Your Computer Blazingly Fast 
Note
This guide was intended for Windows XP, but I would ignore Step 2, Step 10, Step 11, Step 16, Step 28, Step 37.
Optimize Windows 7 http://www.askvg.com/master-tutorial...-7-super-fast/
I would next run an
SFC Scan and a
Check Disk Scan.
What I do as soon as I get a computer os open
MSConfig, select the
Boot Tab and select
No GUI Boot, this will
disable the
Boot Animation.
I would also use
MSE and
Malwarebytes to check for Viruses and Malware.