Hi Cupcakeuk:
I'd never heard of the Lunascape browser before reading your post but the comments <here> for Lunascape v6.15.2 (rel. Feb 2018) on the Major Geeks download site suggest this browser might not be the best choice for the average user.
I'd suggest you try Mozilla's Firefox ESR v52.9.0 (the final legacy version for Win XP and Vista, released 26-Jun-2018). Full offline installers (all regions and languages) are available for download from Mozilla's FTP server at https://archive.mozilla.org/pub/firefox/releases/52.9.0esr/win32/. If you want the English-US installer (Firefox Setup 52.9.0esr.exe), for example, choose the /EN-US subfolder. If you are in the UK as your username suggests there is an English-British installer in the /EN-GB subfolder.
A Vista SP2 OS that is patched to end of extended support (11-Apr-2017) should have a built-in Internet Explorer 9 (IE9) browser but IE9 only supports the old Transport Layer Security (TLS) 1.0 protocol for connecting to secure https sites and can no longer connect to many web sites. By default, Firefox ESR v52.9.0 supports newer TLS 1.1 and 1.2 protocols, and I've added support for the latest TLS 1.3 protocol to my Firefox ESR v52.9.0 (i.e., by changing security.tls.version.max to a value of 4 in the advanced settings). See Martin Brinkmann's June 2017 ghacks.net article How to Enable TLS 1.3 Support in Firefox and Chrome for detailed instructions.
32-bit Vista Home Premium SP2 * Firefox ESR v52.9.0 * Malwarebytes Premium v3.5.1-1.0.365
HP Pavilion dv6835ca, Intel Core2Duo T5550 @ 1.83 GHz, 3 GB RAM, NVIDIA GeForce 8400M GS