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: Windows 7 not booting after mistaken converting partitions to dynamic

10 Mar 2015   #1

Windows 7 Ultimate x32 bit
Windows 7 not booting after mistaken converting partitions to dynamic

I have windows 7 32 bit PC, while creating new partition from unallocated space I mistakenly converted all partitions into dynamic. And when I restarted my PC it shows manufacturer logo and then black screen with continuously blinking cursor.
I'm unable to access anything.
And I'm afraid of data loss.
How I will recover my system without any data loss.
Please help me

My System SpecsSystem Spec
10 Mar 2015   #2

Windows 7 Ultimate 64-bit, Windows 8.1 64-bit, Mac OS X 10.10, Linux Mint 17, Windows 10 Pro TP

Did you create a System Repair disc? If so can you boot to it? If not I'd download a Linux LiveCD or LiveDVD .iso file to a computer and use a CD/DVD burning program to create the disc then boot to it to save your data files, anything you created or that exists nowhere else. Plug in a USB Thumb/Flash drive or USB HDD/Hard Disk Drive before booting Linux and copy to it.
My System SpecsSystem Spec
10 Mar 2015   #3
Microsoft MVP


The problem is that you converted your HD to Dynamic which is only meant to be used to span a partition across multiple HD's. Apparently you didn't see the warning message that you were about to exceed 4 Primary partitions.

The solution to solve this non-destructively is to boot free Partition Wizard CD version 4.2 from Option One of Convert a Dynamic Disk to a Basic Disk

Download the ISO, rightclick to burn it to CD using Windows Image Burner, or use ImgBurn.

Boot CD. You will need to delete the extra partition(s) you created which tipped it to convert to Dynamic before it will convert back to Basic, so back up any files first from within Windows 7 if it will boot, or Copy & Paste - in Windows Recovery Console

Then follow these video steps: How to convert dynamic disk to basic disk with Partition Wizard?

If Windows 7 will not start and you confirm it's been converted successfully, then confirm that the 100mb System Reserved partition (preferred if you have it) or C is Set Active partition - Partition Wizard Video Help, then run Startup Repair - Run up to 3 Separate Times.

After conversion if you want help adding a partition post back a screenshot of your maximized Disk Mgmt drive map with listings, using the Snipping Tool in Start Menu, attached using paper clip in Reply Box.
My System SpecsSystem Spec


 Windows 7 not booting after mistaken converting partitions to dynamic

Thread Tools

Similar help and support threads
Thread Forum
Need help regarding Converting My HDD from Basic to Dynamic
I was Triying to Make a backup on my D: partition and It is getting fail everytime when it reaches the step "Copying files to D:". So I guess It is because my D: drive has lots of stuffs and I think making a dedicated partition for backups will solve this problem. My HDD is a Basic one and I have...
General Discussion
Failed boot into Windows 7 after converting from dynamic to basic disk
This is my first post, but I've been a long time lurker on the Seven forums; and they've provided a great deal of help. I googled for hours and could not find a solution to my specific problem. Wiping and re-installing is my last resort option, but I understand that it's entirely doable. So I...
Installation & Setup
Problem converting Dynamic to Basic Disks
I created a "software raid" using Win7 computer management. The two HDD's are now in a raid0 array using a dynamic disk configuration. I have since decided that I do not want to have them in raid. I have tried several things to change from dynamic to basic including the tutorial shown on this site....
General Discussion
Converting a dynamic disk to basic without data loss
Hello All, Would really appreciate some help. I have a 500GB dynamic hard drive which had a Windows 7 install on it. I wanted to reinstall Windows, so from within Windows setup I formatted the system and Windows partition, leaving a partition containing documents and pictures (i was unable to...
General Discussion
Converting disks to Dynamic Volumes = no boot
I've done this twice in a row now, so I'm sure it's not a fuke: I install windows 7, convert the disks to Dynamic Disks, and try to reboot. THe result is that the system hangs right after it would normally check to boot from the DVD drives, and before it would start booting Windows. The...
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 04:12.
Twitter Facebook