Hardware upgrades do cost money though even if you go for the cheaper options such as RAM upgrades. If you know that your system was healthy in the past, you should consider optimizing your system first just so you can hold on to your money and get hardware upgrades later on as they become cheaper. Here are some things that you can do which all serve as slow computer fixes.
Uninstalling Unnecessary Programs
One of the easiest ways to clear up disk space without scouring through your documents, pictures, videos, and music files is to get rid of any programs that you rarely use. These programs not only take up some disk space which can fragment the drive but also take up some slots in the Windows registry. Think of uninstalling as a safe way to clean some registry entries that will help speed up the system. Some programs run on startup adding some delay to your boot times so uninstalling these programs can safely disable these without you launching any start up managers. You can uninstall programs through the Control Panel by going to Add/Remove Programs or Programs and Features depending on your operating system.
Malware Scanning
Viruses, spyware, and other forms of malware are infamous for messing up settings and corrupting files. Since these malware stay active in memory, they are actively consuming hardware resources which can likely lead to significant slowdowns. If you do not want to go through the painful processes of manually locating these suspicious files or formatting your computer, run a removal tool to shut down any active viruses and then install a free virus scanner to get rid of the rest and actively protect your system from future intrusions. Active virus scanners may actually slow your system down slightly, but it is much better than getting infected.
Registry Scanning
Unfortunately, some uninstallers do not completely remove all components of the application or game. There might be some remnants just in case you decide to reinstall the application and keep your preferences. If you really do not plan on installing the application or do not need the saved preferences, you can conduct a registry scan to improve your performance. A thorough scan may also reveal some possible errors in the registry that can slow down your system or make it unstable.
Do not forget that Windows comes with other diagnostic tools as well such as Disk Cleanup which deletes unnecessary files and Disk Defragmenter which optimizes the hard disk so you can access files faster. As long as you perform these tips whenever you have idle time, your system should remain in good condition.