Mabook pro 13 in. OSX Runs way too slow. Constantly Buffers Too much. Several questions in summary.

Question

I have a Macbook Pro 13 in. Running OSX 10.9.4
Processor 2.5 GHz Intel Core i5
Memory 4 GB 1600 MHz DDR3
I have always sworn by my Mac. It's the best. However in the last 5 months or so everything I do on my Mac take so much time because it runs so slow. My Mac buffers upon every command. It buffers when I move the mouse, every time i click the mouse, when i open app, close app, when I right click on apps, and it buffers at least one time every sentence when typing on word. I have repaired petitions or utilities in the disk utility. Seemed to help a bit but if it even did it was short lived. I haven't noticed it so bad until I installed Mackeeper and ran a few clean ups.(could/could not be relevant). I want to know also how to clean the mail caches from the Mail app and also Microsoft outlook. I read cleaning them out could help performance but I don't want to accidentally erase all of my mail. I do use the mail app heavily. Or rather I use to before my mac ran slow. Please help me to get my mac up and running fast and smooth like it did before. Mac use to get a little hot when not doing it's best before. in the bavk on the bottom, under the screen. However it doesn't run hot anymore, or lately anyway. Last few days has ran pretty good but today its back to it's worst. Thanks a million and any and all help is welcome. Thanks again.

Answer 1

Remove "MacKeeper" as follows. First, back up all data.
"MacKeeper" is a scam with only one useful feature: it deletes itself.
Note: These instructions apply to the version of the product that I downloaded and tested in early 2012. I can't be sure that they apply to other versions.
If you have incompletely removed MacKeeper—for example, by dragging the application to the Trash and emptying—then you'll have to reinstall it and start over.
IMPORTANT: "MacKeeper" has what the developer calls an “encryption” feature. In my tests, I didn't try to verify what this feature really does. If you used it to “encrypt” any of your files, “decrypt” them before you uninstall, or (preferably) restore the files from backups made before they were “encrypted.” As the developer is not trustworthy, you should assume that the "decrypted" files are corrupt unless proven otherwise.
In the Finder, select
          Go ▹ Applications
from the menu bar, or press the key combination shift-command-A. The "MacKeeper" application is in the folder that opens. Quit it if it's running, then drag it to the Trash. You'll be prompted for your login password. Click the Uninstall MacKeeper button in the dialog that appears. All the functional components of the software will be deleted. Restart the computer.
☞ Quit MacKeeper before dragging it to the Trash.
☞ Don't empty the Trash. Let MacKeeper delete itself.
☞ Don't try to drag the MacKeeper Dock icon to the Trash.
If you still have problems after taking the above steps, see below.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
          SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
          View ▹ Show Log List
from the menu bar at the top of the screen.Click the Clear Display icon in the toolbar. Then take one of the actions that you're having trouble with. Select any messages that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.