There are several ways to make your Windows computer faster:
1. If running Windows 10, there is a PowerShell script called "Windows10DebloaterGUI.ps1". It will stop unnecessary background processes from running. It can be downloaded from GitHub and executed. There is YouTube video which demonstrates using the script which can be found at: https://www.youtube.com/watch?v=pkeGuGUegss .
2. Disk Cleanup - This is a tool built into several versions of Windows which helps greatly with improving performance. It eliminates unnecessary temporary files from your hard drive. It can also remove old Windows Upgrade temp files. It can be found by typing "Disk Cleanup" in the Windows Search box.
3. For a computer that is several years old, I can replace your mechanical hard drive with a solid-state drive (SSD). There are two types of SSD's available. If your mechanical hard drive uses a PATA interface, the computer is probably so old that you should consider replacing it. Pay attention to the speed of the CPU to determine if a drive upgrade is worth it.
Many older computers have a mechanical hard drive that uses a SATA connector. The mechanical hard drive is either 2.5 inches or 3.5 inches in width. It's usually a very simple replacement, but the trick is getting your computer to boot properly and getting all your current applications working. This is accomplished via a "cloning" operation, which is different than just restoring a backup image from an external backup drive or cloud drive onto a SSD. There are several software applications that can clone a mechanical hard drive to a SSD. An adapter cage can be used if the new SSD is 2.5" and the mechanical hard drive is 3.5" in width. Most computers have USB ports nowadays. The cable from an external enclosure or adapter cable can plug into a USB port. After making sure the computer is backed up to safeguard your important files, a SSD can be placed inside the desktop computer or laptop. The original mechanical drive can be placed into an external enclosure or merely connected to the USB port via an adapter cable. The computer should be booted onto a "rescue disk", which is usually a USB flash drive, but can be a DVD disc. I prefer to use Acronis Cyber Protect Home Office to perform the cloning operation. It is a little faster than some of the alternatives because it copies only the occupied sectors by default. Acronis (and several other programs) can copy data from the old mechanical hard drive (attached to the USB port) to a new SSD placed into the computer. The capacity of the SSD should be equal to or more than the old mechanical hard drive. Acronis can automatically re-size partitions to fully utilize any unallocated space on the new SSD. I recommend purchasing a 1 to 4 terabyte SSD if your computer is currently using a 512 GB mechanical hard drive.
Newer computers usually have a solid-state drive that mounts to the motherboard. The latest SSD's use the NVMe (Non-volatile Memory Express) M.2 standard and are many times faster than SATA drives. A 2280 SSD is about the size of a stick of gum, but 2230 SSD's are about one inch square. If your computer already has a SSD, it's unlikely that you're experiencing much of a slow-down. However, you may want to replace the current SSD with a larger SSD to gain more storage capacity. This also requires a cloning operation to move your data, the Windows operating system, Microsoft Office (if installed), and any other applications to the SSD without needing to re-install everything.
YouTube videos are available which show how to clone one SSD to another, if you want to do it yourself. However, I can perform this task for you if you're local to my geographic area, or want to ship your laptop to me.