When I go to download minecraft.exe it just crashes straight away and I can't actually go on miecraft.
If you click on minecraft.exe then wait for it to download it will crash
Environment
OS: Windows Vista (ver 6.0, arch x86)
Java: 1.7.0_25 (by Oracle Corporation)
Launcher: 1.0.8 (bootstrap 4)
Minecraft: 1.6.2 (updated Mon Jul 08 21:32:33 BST 2013)
Please follow the instructions on the screen: "Click 'Report to Mojang' and copy paste the information from below into the issue"
Please attach crash reports in the future to tickets about a crash.