The option for the Windows agent is not available when trying to download the client from within the Agents page in VCF Operations for Logs 9.0.x. Only the Linux agents are available for download.
The MSI and BIN deliverables for the VCF Operations for Logs agent are deprecated starting with VCF 9.0.x.
VMware-Log-Insight-Agent-8.18.#-########.msi from the Broadcom Support Portal > VMware Aria Operations for Logs 8.18.x > Drivers & Tools