I had Windows 8 and Ubuntu on two different partitions. I was using both the operating systems as per my needs as I had dual booting options. I have now removed Windows 8 and installed Windows 7 in its place. Now when I start my laptop, I do not get an option to load Ubuntu. It directly enters Windows 7.
How do I find out if my Ubuntu OS is safe?
If so, how do I regain the Ubuntu OS?