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: 100 gb Partition LOST after SHRINKING win 7

27 May 2014   #11

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit

Quote   Quote: Originally Posted by rovshanst View Post
well i can delete disk e. if i delete it will be unallocated yes? then what ad that unallocated space to c:?

Kaktussoft, i cant delete that 117gb partition coz it is named as disk c so im afraid if format it the original c may be deleted thats why first i wanna make as a seperate disk actually i need this
If you delete E, that space will become unallocated. Leave it unallocated for now.

At that point you will have 4 partitions shown in Disk Management, not the current 5.

At that point, you may be able to convert from dynamic to basic. If that is successful, you may show all of C as a single unit, not split. You would have C, D, and system reserved, all "basic", no dynamic.

My System SpecsSystem Spec
27 May 2014   #12

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1

First you have delete 1 partition so only 4 are on drive. Then convert to basic with PW4.2. Mark "system reserved" ACTIVE after converting to BASIC drive ... otherwise system won't boot!!
My System SpecsSystem Spec
27 May 2014   #13

Windows 7 Pro x64 Windows 10 Pro x64

Convert a Dynamic Disk to a Basic Disk

You can not have more then 4 primary partitions with windows

You should have received a message telling you your disk would be turned Dynamic, you must have ignored that message
My System SpecsSystem Spec

28 May 2014   #14
Microsoft MVP


To review, 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.

The solution to solve this non-destructively is to boot free Partition Wizard CD version 4.2 which is the last one which offers this as a free feature: ISO - Windows Live.

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.

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

If Win7 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

 100 gb Partition LOST after SHRINKING win 7

Thread Tools

Similar help and support threads
Thread Forum
Does shrinking a partition lop off content at top of partition?
I was talking to tech support about cloning all 4 partitions in my Toshiba Satellite A660 laptop to a smaller auxiliary HDD (not creating an image, but a clone -- recoverable image may be in the plans in the future). If the laptop HDD suffers a hardware failure, I can drop the clone into the...
Backup and Restore
Partition shrinking
I am having a 320 GB Hard Disk . And windows 7 home premium . I am unable to shrink my OS drive (C drive) to my choice . It is now having 158 GB and I cant shrink it further , so that I can make an another partition . What I have to do now ?
General Discussion
Shrinking a Partition
I have a 250 gb drive, currently all "C". I would like to shrink it to 80 gb (25 gb used). When I run W7 disk manager, it says I can only shrink it to 116 gb due to unmovable files. When I use resize in Partition Wizard, it seems to let me shrink to 80 gb with no issues. I have not hit "go" in...
Performance & Maintenance
Shrinking Partition problem
first of all im running 7229 ok my 1st problem is my computer is only letting me shrink a partition to 13 gbs when theres 109gbs free my second problem im trying two install a second operating system but it keeps showing ata1; softreset failed device not ready ata2; softreset...
General Discussion
Shrinking Partition
OK just been to see about creating a partition for installing Windows 7 and I'm showing my ignorance here with not understanding all these figures so if someone can shed some light on it I would be grateful. I'll be back later to check but this is what it tells me when I ask about shrinking.
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 19:58.
Twitter Facebook Google+