Microsoft says Windows 11 26H2 build 26300.9818 speeds up 8GB PCs

Microsoft says the latest Windows 11 26H2 build, 26300.9818 or later, improves speed and memory management on PCs with 8GB of RAM. The company says Windows keeps up to 2GB more active data in memory and that the build is up to 40% faster than the January 2026 version when multitasking.

Microsoft also says it cut memory growth by up to 900 MB across Windows, Microsoft 365, and Edge. The claims come from a blog post published Tuesday, as reported by ZDNet. The figures are Microsoft's own and have not been independently measured in the report.