Repair Grub after install windows?
Solution 1:
The other answer is correct in the fact that Windows likes to think that it's the only OS on a PC.
What it really boils down to is popping your live CD back in, tell it to repair the Linux installation and that often does the trick.
In the future, I would always suggest the following order of events for setting up a multi-boot / OS PC:
- Linux LIVE CD Boot (pick a distro that you are comfortable with)
- Partition hard drive using the tools available on the live CD
- Install Windows on one of the designated partitions
- Install Linux (and / or other OS).