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Windows 7: unable to install Windows 7 premium OEM on inspiron n5110

12 Feb 2013   #1
waqar bukhari

Windows 7 premium
unable to install Windows 7 premium OEM on inspiron n5110

Friends, I am having a problem in installing windows 7 premium OEM in dell n5110. Windows 8 installs well. I have also tried windows 7 ultimate but it is not working. When I boot from usb it boots successfully, it works fine till selection of language. But after that when It goes to that point where I have to select c drive, it gives an error. The message in the error is "A required CD/DVD driver is missing"

My System SpecsSystem Spec
12 Feb 2013   #2
waqar bukhari

Windows 7 premium

I have Tried Many ISO format windows including The OEM edition that is given in this forum in tutorial section.
My System SpecsSystem Spec
12 Feb 2013   #3
waqar bukhari

Windows 7 premium

Please reply quickly, I have also deleted all my partitions. I am really hating this Windows 8. Plz help me to get back to windows 7.
My System SpecsSystem Spec

12 Feb 2013   #4

Microsoft Community Contributor Award Recipient


I take that the dell n5110 came Pre-installed with Windows 8.

To Downgrade to Windows 7.
Downgrade Windows 8 to Windows 7
Warning you must have the uEFI/BIOS firmware setting in Step Three set.
My System SpecsSystem Spec
12 Feb 2013   #5
waqar bukhari

Windows 7 premium

No. preinstalled version was windows 7 home premium. Before this many time I have used CLEAN Install Win7 oem edition. But now after install win 8 it is behaving strange. one more thing that i just noticed, I had an old win7 dvd it successfully formats partition and goes to next step. It is very old Copy so gave error.
My System SpecsSystem Spec
12 Feb 2013   #6


Unplug all other HD's and peripherals,

Boot into BIOS setup, reset to defaults, save changes. If an EFI BIOS, enable Legacy BIOS or Compatibility Support Module, set DVD drive first to boot, HD second. Then set SATA controller to AHCI. Save changes and Exit.

Then boot into installer DVD or flash stick burned or written using tool and latest ISO for your licensed OS version here. You likely have a bad installer judging from the error.

At first installer screen Press Shift + F10 to open a Command Box, type:

SELECT DISK 0 (after confirming Windows 7 target HD #)
CREATE PARTITION PRIMARY SIZE=102400 (for 100gb partition, adjust as desired)

Next click Install Now, then Custom install to Clean Install Windows 7 to the partition you created. If it fails then report back at which step and the verbatim error message.

In addition read over these steps to understand the tools and methods which work best to get and maintain a perfect Clean Reinstall - Factory OEM Windows 7.

After install you can adjust partition size or Create new partitions for data, etc. in Disk Mgmt.You are creating the partition here for the purpose of marking it Active which overcomes certain install failures.
My System SpecsSystem Spec
12 Feb 2013   #7
waqar bukhari

Windows 7 premium

I have checked It is no uEFI bios. I will try it. I have just downloaded the installer.
My System SpecsSystem Spec
12 Feb 2013   #8
waqar bukhari

Windows 7 premium

I followed your steps successfully. But could not install windows. When I click install now the same message appear. On other computer the same setup is working fine.
My System SpecsSystem Spec
12 Feb 2013   #9

Windows 7 Ultimate 32-Bit & Windows 7 Ultimate 64-Bit

Hi Waqar

On your Dell laptop go inside the BIOS by pressing F2 on the Dell splash screen and make sure your boot order is 1) DVD drive ( optical disc ) and 2) is the SSD or HDD . Also make sure the SATA configuration is AHCI . Also if your settings are set to AHCI change it to SATA. Press F10 to save and restart . Try to install once again .
My System SpecsSystem Spec
12 Feb 2013   #10

Windows 7 Pro x64 Windows 10 Pro x64

Obviously he`s booting from the disc.

If the disc works fine, then there is just some setting you are missing in the bios, on the other hand you`ve said you have installed on this machine before with the same settings, correct ?

That message is usually always the result of a bad burn done to fast.
My System SpecsSystem Spec

 unable to install Windows 7 premium OEM on inspiron n5110

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