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Windows 7: Xp to windows 7 upgrade

12 Jan 2010   #1
KCINREBAK

Microsoft Windows 7 Ultimate
 
 
Xp to windows 7 upgrade

Why can't XP be upgraded to windows 7 but vista can? I want the actual technical answer.


My System SpecsSystem Spec
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12 Jan 2010   #2
Jonathan_King

Windows 7 Professional x64
 
 

I cannot give you an answer based on the source code or anything.

The short answer is that Microsoft did not support it. It is possible to upgrade from XP to Vista to 7, but it is not recommended.

Windows 7 uses different drivers than XP. Almost everything compatible with Vista is compatible with 7, but not XP.

You will agree that the XP settings are also different than 7's, so they will be all but irrelevant.

A clean install is highly recommended.
My System SpecsSystem Spec
13 Jan 2010   #3
WalkerA WinTeam

Windows 7 Home Premium (64-bit) *** Windows XP SP3 (32-bit), OSX 10.6
 
 

Quote   Quote: Originally Posted by KCINREBAK View Post
Why can't XP be upgraded to windows 7 but vista can? I want the actual technical answer.
Hi there,

I assume you're talking about an In-Place upgrade vs. Custom ("clean") install, in which case you're right that Windows XP can't be upgraded in-place to Windows 7. Jonathan_King's answer is accurate; Windows 7's architecture draws heavily upon Windows Vista, although this page has a great breakdown of the differences between 7 and Vista.

In case you're confused about which actual Windows 7 product needs to be purchased in order to upgrade to Windows 7, let me clarify: Windows XP can be upgraded to Windows 7, but a Custom install is required. You only need to purchase the Full Version of Windows 7 if you want to replace a version of Windows that's older than XP (such as Windows 95, 98, 2000, or Me) or a different OS entirely.

Custom Install Windows 7

Cheers,

Walker
Windows Outreach Team
My System SpecsSystem Spec
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13 Jan 2010   #4
1Bowtie

Windows 7 Home Premium 64 bit
 
 

To go one step further than Jonathan and Walker, Vista and Win 7 are on the same kernal so can be inplace upgrade, XP is on a different kernal so can't be upgraded in place. Hope this makes sense.

Smitty
My System SpecsSystem Spec
13 Jan 2010   #5
Shinobi73

Windows 7 Ultimate 64bit
 
 

Also a bit of info on architecture. With both Vista and 7 Microsoft had removed a lot of unnecessary subsystems that were present in XP that utilized too much processing space. To Maximize your processing power some subsystem functions were re routed to other components of your computer.

One example of this is the display – hence the Aero Feature is now completely controlled by your graphics processor rather than your CPU. These features are not present in XP.

Because of the number of subsystems that would be removed it would make the XP platform unusable and thus incompatible with current functions present in Win7

Regarding Vista – this OS is released as a precursor to Win7 and already has most of the subsystems already running that makes it the primary candidate for an “Upgrade”. All Win7 installation needs to do is add the rest on top of Vista and it’s good to go.
My System SpecsSystem Spec
13 Jan 2010   #6
bobkn

Windows 7 Pro X64 SP1
 
 

I'm not competent to weigh in on this, but no one has remarked that XP could be upgraded-in-place to Vista.

That suggests that the reasons for not permitting an upgrade-in-place from XP to Win7 may not have been primarily technical.

Consider the history:

Windows 98, 98SE, Millenium Edition, Windows NT 4.0, and Windows 2000 (aka NT 5.0) could all be upgraded-in-place to XP (NT 5.1). 98, 98SE, and ME were all on the same development branch as Win95. NT 4.0 and Win2k were on the NT branch.

Only XP could be upgraded-in-place to Vista (NT 6.0).

Only Vista is permitted to be upgraded-in-place to Win7 (NT 6.1).

I don't see a pattern there. The phrase "business strategy" comes to mind, not that it explains things.
My System SpecsSystem Spec
13 Jan 2010   #7
win7clutz

Windows 7 Ultimate (64)
 
 

Quote   Quote: Originally Posted by 1Bowtie View Post
To go one step further than Jonathan and Walker, Vista and Win 7 are on the same kernal so can be inplace upgrade, XP is on a different kernal so can't be upgraded in place. Hope this makes sense.

Smitty
Sorry, it makes no sense... If your rational was valid you could not upgrade from XP to Vista.
My System SpecsSystem Spec
14 Jan 2010   #8
Jonathan_King

Windows 7 Professional x64
 
 

The answer is that Microsoft simply did not write the code to upgrade from XP to Vista. I am sure they could do it, if they saw a reason to, but to avoid problems, they didn't.
My System SpecsSystem Spec
14 Jan 2010   #9
manhunter2826

Windows XP - Now Windows 7 Home Premium (64-bit).
 
 

Quote   Quote: Originally Posted by bobkn View Post
I'm not competent to weigh in on this, but no one has remarked that XP could be upgraded-in-place to Vista.

That suggests that the reasons for not permitting an upgrade-in-place from XP to Win7 may not have been primarily technical.

Consider the history:

Windows 98, 98SE, Millenium Edition, Windows NT 4.0, and Windows 2000 (aka NT 5.0) could all be upgraded-in-place to XP (NT 5.1). 98, 98SE, and ME were all on the same development branch as Win95. NT 4.0 and Win2k were on the NT branch.

Only XP could be upgraded-in-place to Vista (NT 6.0).

Only Vista is permitted to be upgraded-in-place to Win7 (NT 6.1).

I don't see a pattern there. The phrase "business strategy" comes to mind, not that it explains things.
I have to agree; this is - in the main - pure marketing on Microsoft's part. I'm not criticizing them but the technical minutiae are beginning to wear thin. Nice thread anyhow and thanks OP for asking the Q.
My System SpecsSystem Spec
28 Jan 2010   #10
KCINREBAK

Microsoft Windows 7 Ultimate
 
 
Hp dv6000 bsod

Been getting alot of blue screens lately referring to files in
AppData\Local\Temp\.... folder. couple of the files were .sysdat extension another was teefer2.sys. Could be driver problem just wondering if maybe I need to update my bios?
My System SpecsSystem Spec
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 Xp to windows 7 upgrade




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