Is it possible to speed up my PC without buying additional hardware?

Yes, it is possible to speed up your PC without buying additional hardware. Some basic steps you can take include running antivirus and anti-malware scans, updating your operating system and drivers, clearing out old programs, deleting temporary files, and disabling unnecessary startup applications. You can also add more RAM or upgrade your hard drive. There are also many free software programs available online that are designed to optimize and speed up your PC.