Hello fellow Lebgeeks, Decided to write this thread while I wait for my Tawook sandwich and I hope some of you find it useful. This thread is basically aimed at programs which help speed up your system/optimization/performance, and multiple cleaners.
If you happen to have any recommendations for this thread, please feel free to simply private message me by clicking here (Click here to PM me and don't forget to add Opeth at the top)

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Windows Optimization/Cleaners/Performance Boosters

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1. What is an Optimization Program?

In computer science, program optimization or software optimization is the process of modifying a software system to make some aspect of it work more efficiently or use fewer resources.[1] In general, a computer program may be optimized so that it executes more rapidly, or is capable of operating with less memory storage or other resources, or draw less power.

This is from the official wiki, so basically it's saying in fewer words; to make your system run more efficient, faster, and cleaner.

2. What is a Cleaner?

A cleaner is a program that deletes unnecessary files, such as cache/cookies/temp data, files, which normally stores up a lot of memory that is not Normandy to have on your system at all times. Even watching a simple youtube video saves temp data.

Cleaner/Optimization Downloads:

So now that has been determined, we can get to the actually list of downloads, as mentioned for the third time, these are ALL from official websites, popular, safe, & working, so don't worry.

1) CCleaner

So CCleaner is by far my favorite cleaner, it removes substantial amounts of un-wanted data/files/temp-files, etc from your system, and I have personally noticed a boost in my browser speed after this is use, sometimes it will clean up to 13GB in no more then a week of browsing. I personally use this once a week to every two weeks, but you can do it daily if you want, there's no recommended time, that's just personal preference.

Download CCleaner (Click Here)

2) SlimCleaner

Personally, I only just downloaded this one, but it may just become my new favorite, it's a cleaner, and an optimization program, it gives off great statistics, has an amazing GUI, and it's a gold certified partner of Microsoft. Definitely worth a try.

Download SlimCleaner (Click Here)

3) GameBooster 3.0

This is by far, 110% no doubt my favorite optimizer there is our there, not only does it give a dramatic increase for FPS for gaming, it speeds up your computer for general use by closing unnecessary applications/processes that are currently open. If you're a gamer, or just a general computer user, I would highly recommend game booster, and it's free, amazing program.

Download GameBooster 3 (Click Here)

4) Advanced SystemCare Free

I personally haven't used this, yet I have watched some reviews, this is from the same people who make Game Booster, which is amazing, so I doubt I would be let down by this software, give it a try, give me some feed back below if you want, or in a private message, and I might give it a try, or if I do, I'll update this thread.

Download Advanced SystemCare Free (Click Here)

Once again if you have any recommendations shoot me a PM like I've stated above.

Tools suggested by fellow lebgeeks :
Windows Directory statistics