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: 0x80300021 install error Windows 7 Pro Dual Boot

25 Nov 2015   #1
wideminnow70

Windows 7 Home 64 bit, Wndows 7 Po 64 bit
 
 
0x80300021 install error Windows 7 Pro Dual Boot

0x80300021 install error Windows 7 Pro Dual Boot
I have a system with two hard drives for a dual boot system.
I swapped out the two hard drives for larger ones.
I installed Windows 7 Home on the first hard drive and everything worked fine with no problems.
When I went to install Windows 7 Pro on the second hard drive, I keep getting the 0x80300021 error message and I can not install the window 7 Pro OS. The second drive is formatted and checked for errors.
See attachment for disk layout. I am trying to load Windows 7 Pro on Disk 1 7-PRO (P drive)




Attached Thumbnails
0x80300021 install error Windows 7 Pro Dual Boot-disk-management.png  
My System SpecsSystem Spec
.
25 Nov 2015   #2
bigmck

Windows 7 Home Premium 32-Bit - Build 7600 SP1
 
 

Why are you installing two Win 7's on your PC? It does not serve any purpose and you are legally supposed to have two Product Keys to do this.
My System SpecsSystem Spec
03 Dec 2015   #3
wideminnow70

Windows 7 Home 64 bit, Wndows 7 Po 64 bit
 
 

I have two separate product keys with 2 separate install disks.
One is for Windows 7 Home and the other is for Windows 7 Professional.
I do a lot of testing on the Windows 7 Home system and when it works properly, I load it on the Windows 7 Pro drive.
Also on the Windows 7 Home disk, I run Windows XP mode that I can not run on Windows 7.
My System SpecsSystem Spec
.

03 Dec 2015   #4
AddRAM

Windows 7 Pro x64 Windows 10 Pro x64
 
 

Why didn`t you unplug Disk 0 before you attempted the install on Disk 1 ?

You`d still have a dual boot and better control over it.

If you swapped out the drives, how did you end up with a recovery partition on Disk 0 ? Did you clone it ?

Where did the Windows 7 Pro installer come from ?

Did you create it, it could be bad, just need to create a new one.
My System SpecsSystem Spec
07 Dec 2015   #5
wideminnow70

Windows 7 Home 64 bit, Wndows 7 Po 64 bit
 
 

The first time I loaded Windows 7 Pro, on 2 separate drives it loaded with no problems without unplugging Disk 0.
The HP Recovery is a copy of the OS that I copied from the original CD for a backup.
The Windows 7 Pro is a OEM disk from Microsoft.
I will try unplugging Disk 0 to see how it works.
Does the Original "C" drive letter change when I plug the Disk 0 drive back in?

Unplugged Drive "0' Worked fine.


Thanks...
My System SpecsSystem Spec
Reply

 0x80300021 install error Windows 7 Pro Dual Boot




Thread Tools Search this Thread
Search this Thread:

Advanced Search




Similar help and support threads
Thread Forum
Dual Boot Install Error - Win 7 Partitions Relettered
Hi, I was attempting to install a Win 7 Pro x64 and Win XP Pro x64 dual boot with Win 7 already installed per the tutorial. During the second attempt to install Win XP, I noticed the partition's assigned letters had changed. The system reserve was assigned C: where before it was assigned no...
Installation & Setup
Dual boot windows 7 and XP Error while trying to install XP
Here's the situation. I already have windows 7 64 bit Ultimate edition installed. I wanted to install a second OS together with my windows 7. I followed this guide,http://www.sevenforums.com/tutorials/8057-dual-boot-installation-windows-7-xp.html to the letter. I managed to install windows xp...
Installation & Setup
Windows 7 / XP dual boot install error-even after following tutorials
I have a Windows 7 installation (x64). I wanted to install windows xp 32 in a dual boot scenario for some backwards compatibility hardware issues (video stuff). Anyway, I read the various tutorials and I have used nlite to put sata drivers into my win xp install iso/cd. My problem is that...
Installation & Setup
Tried to install windows xp to dual boot with
i tried to install windows xp in my bnew acer 4745g laptop preinstalled with windows 7 enterprise(trial for now). but at first try while installing the xp i got a message like.. windows will shutdown to prevent damage.. what should i do. btw i already create a partition for xp while...
Installation & Setup
dual boot windows 7 and vista boot error winload.exe
I installed Windows 7 on a partitioned harddrive with vista on the other half. After the installation i have my boot menu with: Windows 7 Windows Vista Windows vista still works but when i try and load windows 7 i get a boot error message: FILE \windows\system32\winload.exe
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 10:02.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App