Windows 10 System became very slow and laggy after restart, disk usage 100% with average response time 9198 ms



I'm currently transferring the important files on my external hard drive, thank you so much for your help Paul, I truly appreciate it!
 

Did you do this with a desktop or laptop? I'm on a laptop, so I don't think I can have plugged in at the same time. I'm over my old hard drive, I'd rather start fresh with a new copy of Win 10 and my files/pictures
 
A fresh install is always better.
Use the creation tool for usb/dvd.
Install your new ssd.
install win 10 and when it asks for your key press skip, windows should activate when you log in to your microsoft account.
 
A fresh install is always better.
Use the creation tool for usb/dvd.
Install your new ssd.
install win 10 and when it asks for your key press skip, windows should activate when you log in to your microsoft account.

The new SSD drive has a different connector than my old HDD. The HDD had pins that fit into the connection on my laptop, while the SSD has a flat connection. Did I order the wrong SSD?
 
The new SSD drive has a different connector than my old HDD. The HDD had pins that fit into the connection on my laptop, while the SSD has a flat connection. Did I order the wrong SSD?


I got it connected, turns out the HDD drive that I removed also took a small adapter that I had to put on the SSD drive. My current problem now is that I get a screen that says reboot and select proper boot device. I got it to reboot from my usb with win 10, but then win 10 asks my to remove the usb and restart without it, that causes the same message as before. Currently googling my problem.
 
when win 10 asks you to re boot, press f2 to get back into the bios and change the boot order from the usb
back to your ssd drive and save and exit see if that works.