Is it safe to delete unnecessary files from my computer to speed it up? By YL ComputingSpeed Up PC Yes, deleting unnecessary files can help your computer run faster, but be sure to backup any important files before deleting them. If you are unsure of how to delete the files correctly, you could consult a professional. Related Content:How do I remove software that is slowing down my computer?What types of hardware upgrades can I perform to increase my PC's speed?How do I optimize and clean my Windows registry?