O pessoal do Postgres Online Journal pré-compilou os binários do PLV8 para Windows
9.6:http://www.postgresonline.com/journal/archives/367-PLV8-binaries-for-PostgreSQL-9.6-windows-both-32-bit-and-64-bit.html
9.5:http://www.postgresonline.com/journal/archives/360-PLV8-binaries-for-PostgreSQL-9.5-windows-both-32-bit-and-64-bit.html
9.4:http://www.postgresonline.com/journal/archives/341-PLV8-binaries-for-PostgreSQL-9.4-windows-both-32-bit-and-64-bit.html
9.3:http ://www.postgresonline.com/journal/archives/305-PostgreSQL-9.3-extension-treats-for-windows-users-plV8.html
9.2:http:/ /www.postgresonline.com/journal/archives/280-PLV8-1.3-windows-binaries-for-PostgreSQL-9.2.html