Getting back into Ubuntu

[Jonathan G]

While I was reinstalling windows (due to upgrading hardware) I used Ubuntu to hold all the files I wanted to keep and it used a launcher that hat had a pink background. Now when I start my computer it goes straight to windows. How do I get back into Ubuntu again?

 

[Jonathan G]

Firstly I installed windows then Ubuntu and used grub to boot into either one and now grub just seems to of gone when I installed windows7. It would also be nice to get into Ubuntu again via grub though.