> For the complete documentation index, see [llms.txt](https://docs.payfacto.com/payfacto-knowledge/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payfacto.com/payfacto-knowledge/uk-and-intl/applications/securepay/use-the-stpi-secure-installer-to-install-the-rti-sipa-plugin.md).

# Use the STPI Secure Installer to install the RTI-SIPA plugin

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="files"></th></tr></thead><tbody><tr><td></td><td>Installation Process Overview</td><td></td><td><a href="/pages/gAxmsNIDDjbmhUBjEufW">/pages/gAxmsNIDDjbmhUBjEufW</a></td><td></td></tr><tr><td></td><td>Install Microsoft .NET Framework 3.5 SP1</td><td></td><td><a href="/pages/uTvnOxoYYbL9I9KxqGp7">/pages/uTvnOxoYYbL9I9KxqGp7</a></td><td></td></tr><tr><td></td><td>Install Java for Windows</td><td></td><td><a href="/pages/IhrsB8OTsjYyXoNMfY4g">/pages/IhrsB8OTsjYyXoNMfY4g</a></td><td></td></tr><tr><td></td><td>Install the RTI-SIPA Plugin</td><td></td><td><a href="/pages/womC2sgoUpLlnfqzRHEb">/pages/womC2sgoUpLlnfqzRHEb</a></td><td></td></tr></tbody></table>