Hi
Can you see your Linux drive from Windows 7 in Windows Explorer?
You should be able to see what's on it and if you have anything important back it up.
Once you've backed up any data on the drive, I would format the drive and re-install Linux.
If it doesn't automatically create a boot menu then use EasyBCD again.
I use Ubuntu sometimes, but I have it on a DVD that will boot my computer, not on a hard drive.
Right now I'm running Windows 7 on my C:\ drive and Windows 8 on a partition on my D:\ drive.
When I boot into Ubuntu I can see and change anything in my computer.
Before you re-install Linux make a partition for it instead of just installing it on the whole drive.
It's easy to do in Disk Management, especially on a clean just formatted drive.
Nothing to lose. LOL
Don't make the partition too small, I did that with my Windows 8 partition and now it's hard to make it bigger with everything already on it.
I thought that 50 Gigabytes was plenty but even with most of my software on another drive it's tight. I should have erred on the large side.
This article may be helpful....
Dual-Boot Windows 7 and Ubuntu in Perfect Harmony Mike