How to do a reinstall on W10?

[Chronize]

I've noticed that my pc is getting slower and i think it might be that i have never really cleaned out my hdd's and ssd (i have windows on the ssd).
So i was thinking i might have to clean them out and reinstall windows 10 BUT there is a problem , i had W7 before but i upgraded it to W10 for free when they had the update and i dont have the W7 disc anymore so how can i get windows 10 on a usb or a disc for free? I mean is there a way to get windows 10 from microsoft website and then put it onto a usb or what?
(sry for bad english , hope you understand what im trying to say and yes im a noob when it comes to OS)

 

[JackNaylorPE]

A. How to get product key

http://www.techadvisor.co.uk/how-to/windows/how-find-windows-10-product-key-3632749/

B. How to get Install Files

https://www.microsoft.com/en-us/software-download/home

C. How to install

1. Prepare for Windows installation with USB tool
https://www.microsoft.com/en-us/download/windows-usb-dvd-download-tool

2. Connect boot drive (SSD) data cable to lowest numbered SATA port .... but don't connect:
-Ethernet cable
-SATA Data Cable for any other drives

3. Install Windows to boot drive

4. Turn off Windows ability to install Hardware drivers
https://www.tenforums.com/tutorials/48277-enable-disable-driver-updates-windows-update-windows-10-a.html
http://www.sevenforums.com/tutorials/82137-drivers-turn-off-automatic-driver-installation.html

5. Install all hardware drivers from original media in boxes See Item 7 below

6. Connect ethernet cable and run Windows Update till it stops doing anything

7. Install latest drivers for ALL hardware from manufacturers web sites. The reason we didn't do this in step 5 is 3 fold:
-Sometimes MoBo CD comes with licensed utilities with product key embedded and these are not on web site versions
-Its advisable to establish a working out of box conditions
-Sometimes newer drivers require latest Windows Updates

If you have a 2nd drive (HD) ....

8. Shut down and connect HD data cable to 2nd lowest numbered SATA port.

9. Boot to BIOS and make sure that SSD is the 1st boot device, if not fix it

10. Boot to Windows

How you proceed from there depends on where you stuck ya programs .... but either way usingt he original install media or downloaded files, just reinstall them, changing the default installation location to the place where they are already installed.

 

[Chronize]

Thank you so much for a fast answer