Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Custom Install, and Partition

08 Apr 2010   #1

Windows 7
Custom Install, and Partition

Hi, quick question. I got the OS vista installed on one partition and two other partitions for backup and stuff. No OS files in there I believe.

Do i have to delete all partitions or just the one that contains the old vista OS to upgrade? I can't do a direct upgrade because I want to go from 32bit to 64bit, and also from home premium vista to 7 profressional.

Or do I have to delete all partitions? I got a large backup up to do...probably 4 hours if I have to delete all partitions.

Also how do I upgrade to 64bit? When I put in the 64bit CD it says you can't have to use the 32bit? Am I suppose to use the 32bit cd and it will let me pick 64 bit later on? Or it won't work because of the partitions?

My System SpecsSystem Spec
08 Apr 2010   #2
not so gray matter

W7 Ult. x64 | OS X

You should do a *almost* clean install. You don't have to format your entire disk, but you do have to format that system partition. Even though your other files shouldn't be touched, I would back them up anyway.

Follow this tutorial, but instead of formatting your entire hard drive, just format the partition that Vista was located on.

Clean Install Windows 7

I believe that should work properly. If it doesn't, you can always do a real clean install after backing up all of your files on those other partitions. If you need a decent partition manager Partition Wizard is free and works well.

As far as your worries about the "upgrade" portion, you don't have to worry about this. As long as you wait until the operating system is installed to enter your cd key you can perform a clean installation (on a formated partition).
My System SpecsSystem Spec
08 Apr 2010   #3

Windows 7

Thank you, what about the 32bit to 64 bit? Is it because I'm not booting from the CD that i'm getting that problem? If i pop in the 64bit cd and boot from that, I won't have any problem?
My System SpecsSystem Spec

08 Apr 2010   #4
not so gray matter

W7 Ult. x64 | OS X

I'm not entirely certain but I think you should just use whatever version you want to, I don't think it makes a difference since you're deleting the previous operating system anyway.
My System SpecsSystem Spec
08 Apr 2010   #5


The answer to your question is that you cannot run a 64 bit installer from a 32 bit Operating System, and vice versa. You must boot the installer to do a clean install as explained above.

Since you are overwriting the old OS, it is best to format that partition. As long as you separate your data onto another partition and do not touch that partition during install, it will be safe and ready to access after install.

But it is always best to back up data you cannot afford to lose.
My System SpecsSystem Spec

 Custom Install, and Partition

Thread Tools

Similar help and support threads
Thread Forum
Custom install Windows 7 but have double OS files due to OEM partition
Hey all! I have a Acer Aspire 5735Z with a 160GB hard drive which is split into 3 partitions (C: , D: & OEM Reserved Manufacturer) running Windows 7 Ultimate x64. The original OS was Windows Vista Home x32. I did a custom install of Win7, leaving all partitions as they were (besides overriding...
Installation & Setup
Creating a Custom Recovery Partition
Hello, I have recently installed a fresh copy of Windows 7 on my Qosmio, installed all the drivers and necessary system utilities and programs that I wanted. Now, that took me a good few hours and quite a bit of effort. So, I thought of a way to prevent myself from having to do exactly the same...
Backup and Restore
How do I hide a disk/partition which has a custom drive letter?
Hello all, I've been trying to find a way to hide my swap partition, but all available information on doing so either leads to group policy editing (which only has various combinations of the drive letters A, B, C, D, E for hiding), drive letter removal (which is an untenable solution given that...
General Discussion
How to create system partition for Win 7 custom install?
I discovered this forum while planning my system upgrade from XP to Windows 7. There is so much useful information here, thanks to the many contributors. I am in the planning stages before my Wndows 7 install which is based on Kari's old school geeks method. I have been browsing through the...
Installation & Setup
Custom PC BSOD after Java install and Flash install
Good afternoon. I have a custom system with 64-bit Win 7 Home Premium (OEM upgrade from Win XP) Gigabyte 965-P DS3 with Q8200 CPU @ 2.3 GHz, Award BIOS F14 6 GB RAM PCI-E 8400GS NVIDIA card 500 GB SATA Hard Drive Norton 360/Security Suite Office 2007 Just recently did the BIOS, Processor,...
BSOD Help and Support
Custom Recovery Partition Help
Is anyone familiar with making a non windows recovery entry? Or custom entrys to boot into for that matter. I'm looking to use something like Hirens Boot Cd/USB however just have it on its own partition and not on a removable device. I know its more secure on a usb drive but im periodically in...
Chillout Room

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:27.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App