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Windows 7: will uninstalling windows 7 effect windows 8

07 Jan 2014   #1
mori uk

windows 7 professional x64
will uninstalling windows 7 effect windows 8

hi guys
I have this query and hopefully one of you can assist me please
my laptop is a Sony vaio which came with 64bit windows 7 already installed on (C:) partition.
later on I installed windows 8 on (D:) partition (duel boot) and both of them work superbly.
now my question
if I uninstall and reinstall windows 7, would it effect windows 8 which is installed on a different partition?
many thanks

My System SpecsSystem Spec
07 Jan 2014   #2
Microsoft MVP


Let us see a screenshot of Disk Management - Post a Screen Capture Image to be sure there's not a Logical partition or other hurdle involved.

If you boot 7 installer to do a perfect Clean Reinstall - Factory OEM Windows 7, making sure to delete, recreate and format the 7 partition during Steps 7 and 8 of the illustrated steps here to Clean Install Windows 7, then it should add 8 to a Dual Boot. If 8 holds the System boot files then it will simply update them for Dual Boot.

If this doesn't happen then you can always install EasyBCD to the new Win7 installation to add Win8. EasyBCD (click Download - no Name or Email required)

But let us see the screenshot to be sure as about half the time there is something unexpected, especially if you still have the factory partitions on there which won't run anyway after reinstall. While you wait study the steps compiled to get and keep a perfect Clean Reinstall - Factory OEM Windows 7.
My System SpecsSystem Spec
07 Jan 2014   #3
mori uk

windows 7 professional x64

hi gregrocker
many thanks for your prompt reply.
I have attached the screenshot for your inspection.
I guess I have to mention, the image was captured when I was using windows 7.
thank you again, I really appreciate it.

Attached Thumbnails
will uninstalling windows 7 effect windows 8-disk-management.png  
My System SpecsSystem Spec

07 Jan 2014   #4

Microsoft Community Contributor Award Recipient


Using the Sony Vaio Recovery Disk's or Recovery Partition will delete the all the partitions.
My System SpecsSystem Spec
07 Jan 2014   #5
Microsoft MVP


Make your Sony Recovery disks if you think you might need to ever go back to the factory install, mainly if you're under warranty and they require it to ship back for service or you might want to sell it in that condition.

However we've always been able to resolve any issues with Sony hardware on a Clean Reinstall - Factory OEM Windows 7 which is discussed in the Special Note for Vaio Owners at the end of so if you're like the vast majority we've helped with this here you will never want to go back to factory bloatware install yourself.

So it's up to you if you want to keep the Recovery partition after you make the disks. It may not run from boot after a Clean Reinstall, however if the disks ever failed we can help you Boot Recovery Partition using EasyBCD from the OS. I wipe Recovery partitions on my machines because I want nothing to do with that mess.

Once you decide and have done your backup and other preparations as compiled in Clean Reinstall - Factory OEM Windows 7, boot the installer, referring to the illustrated install steps in Clean Install Windows 7 when you get to Steps 7 and 8 use the Drive Options to delete System Reserved, C, and if you want Recovery partitions. If you do not touch the D, E and F partitions then nothing on them (including WIndows 8) will be affected.

In the space you've deleted using the Drive Options, create a new Install partition. It may prompt you that it wants to create a new System Reserved partition which is fine. Highlight the new install partition to Format and then click Next.

If things go as expected it should add Windows 8 to a Dual Boot menu, if not install EasyBCD to Win7 to add 8. Windows 8 cannot now boot itself since its System boot files cannot be written to a Logical partition until it is converted to Primary and marked Active. However since you want a Dual Boot then Win7 will be booting Win8 anyway.

Be sure to follow the Clean Reinstall - Factory OEM Windows 7 steps closely because you will get and keep a perfect Win7 install to the exact extent you do. Put your network driver in the backup in case it's not provided during install so you can install it to get online quickly to enable Automatically deliver drivers via Windows Update (Step 3) then run all rounds of Important and Optional WIndows Updates, with reboots, until there are no more. This will deliver most drivers and critical Performance and Security Updates. Any drivers still missing after this in Device Manager can be imported from the Vaio Support Downloads webpage for your exact model.

Wait to see if you need any of the Vaio software for important functions you rely upon on the laptop, otherwise avoid it to enjoy Win7 for the first time on that machine in its native perfect state.
My System SpecsSystem Spec
08 Jan 2014   #6
mori uk

windows 7 professional x64

hi gregrocker
thank you for well explained guidance, it has been an education.
I think I,ll take your advice and go for the Clean Reinstall-Factory OEM Windows 7 to experience the true windows 7.
I have also downloaded the EasyBCD just in case I get any problem with dual booting.
thanks again for helping me out and also thanks to theog for pointing out the result of Recoveries.
solved now.
My System SpecsSystem Spec
08 Jan 2014   #7
mori uk

windows 7 professional x64

well it is a new OS and although is very similar to windows 7 there are still many new features to experience, I personally love Windows 8 it looks really elegant, starts and shuts down a lot faster and after getting used to it you don,t want to be without it.
after all you can still keep your windows 7 so why not?
My System SpecsSystem Spec
08 Jan 2014   #8
Microsoft MVP


Let us know how it goes.
My System SpecsSystem Spec

 will uninstalling windows 7 effect windows 8

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