Windows 10 is faster than Windows 8.1 and Windows 7, according to a recent study. The study, which was conducted by computer benchmarking firm PC World, found that the operating system ran smoothly on three of the four devices tested - a Lenovo Yoga 910 laptop, an Acer Aspire One 7 laptop and a HP EliteBook 8460T. However, it did not run as fast as either Windows 8.1 or Windows 7 on the Asus Rogbook 11 Z580L-BK model. This suggests that 32-bit Windows 10 may not be as fast as 64-bit versions of these OSes in some cases.