As of my latest knowledge cutoff in May 2025, Java SE 8 Update 451 (8u451) does not exist as a public release. The last publicly available updates for Java 8 are in the 8u421 and 8u431 range (depending on the support lifecycle). It is possible this is a typo, an internal build, a future version number, or a file from an unofficial source.
If you need a modern Java runtime for general use, download or Java 21 LTS from Adoptium or Oracle instead. If you specifically require Java 8, use 8u421 (or the latest public build available) from a verified source. jre-8u451-windows-x64.exe