answersLogoWhite

0


Best Answer

There are several reasons why Windows XP does not run on a 486:

1. Most 486 computers simply cannot support enough memory to run Windows XP. 64 MB is pretty much the maximum you'd ever find in a 486; 8 to 16 MB is most common.

2. The kernel in Windows XP is SMP-enabled by default. To support SMP, Windows XP uses an instruction called CMPXCHG8B, which is only found in Pentium and later processors.

3. In order to allow for optimizations on-the-fly, such as using MMX or SSE instructions, Windows XP also requires the CPUID instruction, which only the later 486 processors had.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why doesn't Windows XP run on a 80486 processor?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Can Intel 4 run win 7?

It's depend on what you mean by "intel 4". If you mean "pentium 4" : yes, it is fully compatible with windows 7 32-bit and some models of pentium 4 can run the 64-bit version too. If you mean "80486" (or 486) : no, that processor can't run Windows 7 or even XP.


You have an 80486 computer and need to install either Windows XP 64-bit or 32-bit. Which one is best and why?

Both are impossible. An 80486 is far below the minimum requirements for Windows XP, and lacks certain instructions used by Windows XP that are only found in Pentiums and later. Examples include CMPXCHG8B, CPUID, and CMOV. The last version of Windows to officially support the 486 was Windows NT 4 and Windows 98. Windows ME and 2000 could be shoehorned onto it, but it ran extremely poorly.64-bit versions of XP only run on 64-bit processors, such as the Core 2 Duo or AMD Athlon 64. The 80486 is a 32-bit processor, so even if the above were not true, you couldn't run the 64-bit version.


Can you install Windows 7 on an Intel Atom processor?

Yes. Windows 7 will run on a computer with an Intel Atom processor.


Windows does not run on an Intel microprocessor?

Windows does run on an Intel processor. It just does not run on an 8085. It requires an 8086/8088 (Windows 3.1) or 80386 (Higher versions) to run.


Can you install Windows XP on a 486?

No. Windows XP will not run on a computer with a 486 processor.


Can windows 7 work on intel core 2 Dou processor 1.2GHz?

Yes, it should run on such processor.


What apple computer can you run windows OS on?

An Intel processor Apple Computer.


What is Windows Command Processor?

Command processor in windows is the command prompt(cmd). To start Windows command processor use winkey + R this will open Run window.Just type in cmd and this will open command prompt of windows where you can run various commands.You can create,delete files and folders, list the directory contents and can perform many other functions in command prompt.


What kinds of computers is Windows compatible with?

In order to run a Windows OS you need to have an Intel processor. Mac OS X will only run on an apple computer. Some apple computers are using an Intel processor so you can run a Windows OS or Mac OS.


Will windows 98 run on a dual core processor?

It will run, but very poorly. I recommend not using Windows 98. Windows 98 is very unsecured, incompatible, and very unreliable in todays computers.


Which windows 7 can you run on a dell optiplex gx520 4gb ram 2.8 ghz Pentium d processor?

Windows ultimate


Does your computer have to be switched on for Windows Defender to run a scan?

No, the computer doesnt have to be switched on.