While this isn't the way most Linux enthusiasts chooses to dual boot Windows & Linux OS's, it's worked for me for years & avoids a 'double boot' that happens when choosing to boot into Windows.
The EasyBCD 2.2 app (free, registration required), though some other sites such as Major Geeks has it where it's a direct download. Normally I link direct download from the source where possible, it's my preference, part of an overall safe computing strategy. There are times when I have to deviate from that, though I keep this to a minimum for safety.
What this app is, among other things, a custom bootloader that many uses for total control over booting two or more OS, on one or more drives, or to avoid the double boot that Grub or a later version of Windows, if installed as a dual boot, creates. For example, if one has the Windows 10 Preview (or 8.1) installed along with Windows 7, if one wants to get into Windows 7, two full reboots are required. This isn't just unnecessary, it's pure out absurd & eliminates one of the top reasons to have fast SSD's installed. For fast boot times. It's like traveling half way around the city to get to a store just two blocks away, the way that newer OS's does the old (by design).
The way to use it is simple. When creating a Linux boot entry after installing & opening the app in your main OS, just click onto 'Create New Entry' tab, and then there will be some choices, click the Linux tab, be sure to select Grub2 from the drop down menu (if you just choose 'Grub' it won't work), you can name the OS, after that you may see the 'automatically find' entry, if desired that can be used, however I've done it both ways, one choose the root partition that their Linux OS is installed on & click Apply. If successful, it'll show that Kali Linux (or whichever desired) has been added to the boot entries successfully (or similar wording).
While I've simplified this process much as possible, most anyone with using custom apps can easily catch on as to using this app, and it's made my dual, tri & quad booting experience no less than a pleasure, with several OS's across one or more drives.
Hope that this can be of use to you.
Edited by cat1092, 06 June 2015 - 10:13 PM.