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: clean win 7 install to ssd: avoiding 100 mb loss, not sure if i am

24 Dec 2011   #1

Windows 7 and XP on my server
clean win 7 install to ssd: avoiding 100 mb loss, not sure if i am

hello friends. Merry Christmas Eve!

finally getting around to my first win 7 install on my new 120 gb mushkin chronos deluxe.

I am using tweakhounds win 7 install guide found here:
TweakHound - Installing Windows 7

particullary, I am trying to avoid the 100 mb loss:

*Avoiding the 200MB partition: Folks have discovered that on an unpartitioned drive Windows 7 will create a 200MB system partition. This is easily avoided by creating a partition before attempting to install Windows 7 (see above). (for some this partition will be 100MB)
**Exception for SSD drives to avoid the 200MB partition and partition / format the drive.
Partitioning is a little different for SSD (Solid State Drives). This is because of something called NTFS partition alignment. Basically this refers to where on the drive the partition starts. Vista and 7 will create a single partition optimally for SSD's. XP and most program boot disks will not. If possible you should partition the disk under an already installed Windows 7 or Windows Vista machine and then proceed with the usual installation steps. If not then this is the way to do it:

Windows 7 Installation Advanced Drive Formatting
1 - Boot up from the Windows 7 installation disc.
2 - Choose Repair your computer.
3 - In the System Recovery Options screen, choose Use recovery tools... and click Next.
4 - Open the Command Prompt.
5 - Type diskpart and hit Enter.
6 - Type list disk . Find the disk you wish to install Windows 7 on. If you only have one disk then it will show as disk 0. If you have multiple disks find the drive you wish to install 7 on.
7 - Type select disk 0 (or use the number of the disk you wish to install Windows 7 on)(note - that is a zero)
8 - Type list partition. There shouldn't be any.
9 - Type create partition primary.
10- Type select partition 1.
11- Type active.
12- Type format quick.
13- When finished reboot and begin your installation.
( DiskPart Command-Line Options )
After reboot, the ssd shows as having 100 mb used and is listed as a system drive.
Am i doing it wrong, or am i misinterpreting what I see, and i am saving the space...

Am i not getting the expected result(saved 100 MB) or am I misunderstanding what windows is showing me?

My System SpecsSystem Spec
24 Dec 2011   #2

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit

Are you attempting to do a clean install on a brand new drive?

If so, you wouldn't do steps 2 and 3 that you posted.

If it's a clean install on a new drive, try the steps below.

First: disconnect all other hard drives.

Then, boot from the Windows install disc.

1. Once Windows 7 Setup is loaded, press Shift + F10 keys at the first setup screen (which allows selection of language, keyboard and locale). A Command Prompt window will be opened.

2. Run Diskpart, the built-in disk partitioning tool of Windows 7, with the following command:


3. Type in the following commands one by one, followed by the Enter key to create a partition (text in brackets are comments only):

list disk (to show the ID number of the hard disk to partition, normally Disk 0)

select disk 0 (change 0 to another number if applicable)

clean (this deletes all existing partitions and is not necessary on a new unused drive that has no partitions; this command does not write zeroes to drive; use clean all to write zeroes)

create partition primary (use a similar command to create more partitions if needed or create in Windows 7 after installation)

select partition 1


format fs=ntfs quick


You will then be dropped back into the Windows installation and should not have the 100 mb partition.
My System SpecsSystem Spec
24 Dec 2011   #3
Microsoft MVP


If it installed with the 100mb System Reserved partition anyway then I'd not worry about it - it's only 100mb and there is no downside to having it.

If you really have the need for the 100mb, boot free Partition Wizard to mark Win7 partition Active, click on Disk to highlight it, from Disk tab select Rebuild MBR, Apply, reboot. If Win7 doesn't start boot into DVD Repair console to run Startup Repair 3 times until Win7 starts.

You can then boot back into PW CD to delete 100mb partition, Resize Win7 partition to the left onto its space.
My System SpecsSystem Spec

25 Dec 2011   #4

Microsoft Community Contributor Award Recipient


First check to see if your new MOBO has a uEFI BIOS.
As most new MOBO's now have a uEFI BIOS.

How to install Windows 64 bit on a uEFI BIOS:
UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with
My System SpecsSystem Spec
25 Dec 2011   #5

Windows 7 Pro x64 SP1


Personally, I don't see a big problem with losing 100megs of disk space. the gotcha is that if you use an image program to backup your c drive. It is a good idea to also include the image of your system drive of the 100megs.

This makes it much easier to replace your boot drive..

My System SpecsSystem Spec

 clean win 7 install to ssd: avoiding 100 mb loss, not sure if i am

Thread Tools

Similar help and support threads
Thread Forum
Fresh Windows 7 install large performance loss
The quick overview is I had to install windows 7 over my windows 10 due to an issue with my webcam not working. This has been resolved but my fps on almost every title has dropped, even in terms of pure pc use my pc has slowed dramatically. I figure the quickest way to show this is by posting a...
Performance & Maintenance
Evening Internet Connection Loss -- Unable To Identify Source Of Loss?
I need your help!!! I got a real challenge for you! I am confused! I cannot locate the Internet connection loss source. Every night for the past 5 late evenings my Windows 7 Pro 64-bit has been losing my Internet connection on my desktop computer anywhere between 8 PM-12 AM (Last 3 nights: 11:05...
Network & Sharing
Power Loss To Notebook Shows Loss of Windows Activation (!!??)
I had a power loss while running on battery (it still showed power left, but suddenly shut down anyway) and when I restart, it reports that the Windows is not activated and Window is not genuine and system might be a victim of "counterfeiting." Is this a virus (I have MSE on continuously and...
Windows Updates & Activation
Loss of disk space on Samsung external 1TB drive after 'clean up'
I know about the immediate 'loss' of disk space owing to the two different methods of measurement. 1Tb to 931Gb - it's annoying, but I'm used to it. No, before a defrag by Fixbee I had 701Gb free, afterwards - in a matter of 2 hours - I had 537Gb. Obviously, I'm not going to use this product...
Performance & Maintenance
Clean Install of Win7 - Wipe Hard Drive Clean
Hi Folks, I just did a clean install of Win7 and must have done something wrong. I found a file called Windows.old.:confused: I would like to wipe my hard drive completely clean and then install a fresh copy of Windows 7 Home Premium. How do I accomplish this task? It's a good time to...
Installation & Setup

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 12:32.
Twitter Facebook Google+