If you need your laptop aside one day and started using it, you will definitely need this information. You can speed up your old flat top computer by replacing, updating or cleaning things. Let's give more information.

You should not fill your hard disk too much.
If your computer's hard disk is too full, this can cause it to slow down. The more files, the more difficult it is to access. Therefore, do not fill your hard drive too much. If you have filled it, you can also transfer your files to the external disk.
You should try to change the browser.
If the fights are in your browser, there may be problems arising from your browser. You can fix the speed problem using a different browser. The principle of operation of each browser is different. As an example, Chrome is recommended in terms of speed.
You should remove unused programs.
Unused programs are always a burden on the computer and cause it to slow down. Uninstall programs you are not using. In this way, you will both relax your hard disk and relax in RAM. This solves your computer's speed problem to some extent.
If possible, you should supplement RAM.
RAM reinforcement relaxes computers, although it is not possible for laptop computers. Laptop computers can be replaced with a larger capacity RAM than reinforcement. For example, if it has 4 GB of RAM, you can remove it and replace it with 8 GB of RAM.
You must use an SSD.
Using SSD will speed up your computer radically. Generally, HDDs are used in computers. The writing and reading speed of your hard disk is therefore low. You can increase this speed by using SSD. You need to install Windows on SSD. This way you can get more efficiency.
You can reset your computer to factory settings.
Just like phones, computers do not throw away some files, even if they are deleted. These files accumulate and cause your computer to slow down. These files are deleted with the format. After the format, your computer works better than before. This is a recommendation to increase the speed of the computer.
You can try to speed up your computer by applying whichever of these options you need.