It's been 20 years since Microsoft first introduced the long filename (LFN) in Windows NT 3.5, but NTFS continues to generate a short filename for every file you write today. This reduces the filesystem performance and introduces additional writes that are unnecessary unless you are using a very old application that can only understand the old 8.3 short filename format.
Unless you are using old software from when Keanu Reeves and Sandra Bullock first broke out into stardom in Speed, you should disable the automatic generation of the 8.3 short filename. Doing so will give a kick to the NTFS file system's performance, and if you are using an SSD, help maintain its performance and lifespan.
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips