haaaalpppp meeee i need my pc to be faster!
Never see this coming, but this has to be a first completely serious comment to you..
First a fact of the matter: you can't speed up your computer if you don't know what to do and why, so here is a checklist to use:
It would be nice if you would have some kind of facts about the speed you are looking for, like basic facts about the machine and what it is capable at best.
1. do you have antivirus- software which is up to date? If not, buy one.
2. download ccleaner and use it. Do the registry check not once, but as many times it takes until it finds 0 errors.
3. before installing antivirus-software, use online- antivirus- scanners like F-secure, Trend-micro, Eset and run them all at once, at same time.
4. download Spybot - Search & Destroy, and run it. Let it delete all findings.
And after all this, if your machine isn't fast enough, go to control panel ->
https://support.microsoft.com/en-us/help/2601726 and uninstall all the unnecessary crap you don't need. Most of the manufacturers "free software" is crap you don't need at all.
And after doing all this, if your machine hasn't reach it's normal speed, then go to task manager and with google, check out what things there exactly do and remove what you don't need.
Point is that if you don't know shit about the machine, you can't do anything to make it better. For example, in the Intel processors is a mechanism which drop CPU's speed in half to prevent overheating, if cooling system has malfunction = if you have shit in the fan, your machine lost half of it's speed
