Does defragmentation really help speed up my PC? By YL ComputingSpeed Up PC Yes, defragmentation helps to speed up your PC by improving file access time and reducing the amount of time needed to read a file from your hard drive. It can also reduce the number of disk reads and writes, which can help speed up your PC. Related Content:How can I speed up my internet connection?Are there any ways to improve my RAM performance?Is it safe to use disk optimization to speed up my PC?