📎 AI Summary:
The thread discusses difficulties in installing a 64-bit version of Windows 7 on a system currently running 32-bit Professional. The original poster is concerned about data safety on drives D and E and questions whether a custom installation will format those drives, as well as the possibility of upgrading from 32-bit to 64-bit. A responder clarifies that a 'custom' install is a clean install that typically formats only the C drive and advises changing the BIOS boot order to install from the Windows media, confirming that switching from 32-bit to 64-bit requires a custom install. Overall, the user appreciates the assistance and concludes the thread with thanks.
someshbun

someshbun

New Member
Joined
Jun 11, 2014
Messages
3
Thread Author #1
hello ppl,

i have an iso image of windows 7 all in one

i put it on a pen drive using windows 7 usb/dvd tool

rebooted the system

installation came but i am not able to install 64 bits windows 7 ..it tells me to do custom installation and a compatibility report comes when i choose upgrade.

what does custom installation means ? will it format d and e drives along with c drive? what will it format?

i have a windows 7 professioanal 32 bits os

if i have to do custom installation can i do it for 64 bits ultimate version since its better i guess

means can i go from 32 bits professional to 64 bits ultimate?

please help!
thanks :)
 

Solution
kemical
Hi,
a 'custom' install is basically a fresh or clean install and will wipe the C drive only. If your running 32bit os and want to change to 64bit then you'll need to perform a custom install as opposed to a 'upgrade' install. An upgrade install is where you just pop the install DVD in the drive and follow the prompts. To perform a custom install you'll need to enter the bios and change the boot order so you boot off the windows media whether it be a DVD or thumb drive. That means changing the boot order so that either the DVD drive or thumb drive, whichever holds the os, is first.
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someshbun

someshbun

New Member
Joined
Jun 11, 2014
Messages
3
Thread Author #2
i have d and e drives that i need to be safe..what is old.windows folder? will it save my d and e drive contents??
 

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kemical

kemical

Essential Member
Joined
Aug 28, 2007
Messages
36,163
#3
Hi,
a 'custom' install is basically a fresh or clean install and will wipe the C drive only. If your running 32bit os and want to change to 64bit then you'll need to perform a custom install as opposed to a 'upgrade' install. An upgrade install is where you just pop the install DVD in the drive and follow the prompts. To perform a custom install you'll need to enter the bios and change the boot order so you boot off the windows media whether it be a DVD or thumb drive. That means changing the boot order so that either the DVD drive or thumb drive, whichever holds the os, is first.
 

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