Sure, here are six tips to improve your computer's performance:

1. **Physical cleaning**: Remove dust and dirt from inside your computer, especially from fans, heat sinks, and air intakes. Proper ventilation helps keep temperatures down and prevents overheating, which can decrease performance.

2. **Hard Disk Drive (HDD) Defragmentation**: If your computer still uses a hard disk drive (HDD), defragmenting it periodically can help organize data more efficiently, thus improving file access time and overall system performance.

3. **Update drivers and software**: Keep your hardware drivers and operating system up to date. Outdated drivers can cause compatibility issues and impact performance. Additionally, keep your apps and programs up to date to ensure they are optimized and bug-free.

4. **Manage startup programs**: Disable unnecessary programs that start automatically with the operating system. This can be done through the Task Manager in Windows or the Activity Monitor in macOS. Fewer startup programs mean faster boot times and more resources available for important applications.

5. **Increase RAM**: If possible, consider increasing the amount of RAM on your computer. More RAM allows your system to run more applications simultaneously without slowing down performance. Be sure to check compatibility with your hardware before upgrading.

6. **Upgrade to an SSD**: If your computer still uses a conventional hard drive (HDD), consider replacing it with a solid-state drive (SSD). SSDs are significantly faster than HDDs, resulting in faster boot times, faster application loading times, and better overall system performance.