If you have money to burn, why not take advantage of Dells extra service of installing Mozilla Firefox on your new PC? It'll set you back just over 16 quid, and that doesn't cover updates.
A week of Windows 10, holograms and Exploding Kittens on Mars
Office 2016 launching this year, touch apps coming soon
Microsoft reveals the next version of Windows 10
Introducing Windows 10 for phones
Hands on with HoloLens
Download: Windows 10 build 9926