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Windows 7: How keep DOS as partition C with dual-boot DOS & Windows 7 ?

09 Jan 2012   #1

W7ult x64
How keep DOS as partition C with dual-boot DOS & Windows 7 ?

I installed DOS into 2GB FAT 16, then installed Windows 7 Ultimate expecting W7 to install itself in a partition with a drive letter other than C (just as XP had done in a previous dual-boot setting with DOS) But no, W7 has hijacked the C drive letter for itself.
How can I stop W7 from "stealing" from DOS, the drive letter C, for itself?

My System SpecsSystem Spec
10 Jan 2012   #2

Windows 10 Pro X64

I have to ask! Why do you need or want DOS? If it's for some apps then there is Oracle Virtual Box which runs under Windows 7 or even DOSBOX.
My System SpecsSystem Spec
10 Jan 2012   #3

W7ult x64

No, not for running "legacy" apps. This for me is an extra layer of security for instances where malware - or similar - assumes my OS in on drive C, and comes up empty handed 'cos it's someplace else. I also get some delight in seeing - and more practically, filtering out - some badly written software that assumes it knows better than I where my OS resides
My System SpecsSystem Spec

11 Jan 2012   #4

Win 8 RP, Win 7, XP

You can install an OS (Windows 7) while running another OS (could be Windows 7 again).
This installation will receive another drive letter (not "c") for its "home" drive.

To install this way you should have a free partition (drive d: or e: or...) for the installation and run setup.exe found on installation media while booted to any Windows OS.

Usually people have problems later using this way of installation (confusion with drive letter c: not being assigned to home drive).

Security is always an issue but there is antivirus software, firewalls etc.
My System SpecsSystem Spec
11 Jan 2012   #5
Microsoft MVP


Win7 always sees itself as C when correctly installed at boot. if you want to use the incorrect method then it will have to be installed from another booted OS.
My System SpecsSystem Spec
11 Jan 2012   #6

W7ult x64

Thank you boyens! and thank you gregrocker!

So for next time I would first install a minimal XP, then go on and install W7 from WITHIN XP.

As for the question of security, I use the "layer" philosophy; so I have AV, separate firewall, etc and this decoying to a C: that has only DOS62 - (with its three NT boot-related files) - is just another layer.

Thanks again people!

My System SpecsSystem Spec

 How keep DOS as partition C with dual-boot DOS & Windows 7 ?

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