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I have a Dell Inspiron 8600 laptop that is running Windows XP (SP3) that I dug out of my attic the other night. It will boots up, lasts about 5 minutes (only for one user account). Then it pops and reboots. I'm try to install Ubuntu 15.10 (32-bit) on it as my new operating system. When I boot from my Ubuntu 15.10 disc (It works) it shows the Ubuntu loading screen then goes and says "WARNING: PAE disabled. Use parameter 'forcepae' to enable at your own risk! This kernel requires the following features not present on the CPU: pae Unable to boot- please use a kernel appropriate for your CPU.' I googled around and it seems pae gives you extra memory. I'm scared to enable this because I dont want to screw my computer up. Should I enable pae?

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    "This kernel requires the following features not present on the CPU: pae Unable to boot- please use a kernel appropriate for your CPU" You CPU does not support PAE, you can force PAE as it says, you porberbly should not do this. PAE lets a 32bit OS use more than 4GB of RAM it does not give you extra memory, you only have 512mb of RAM, you don't need PAE at all. – Mark Kirby Nov 6 '15 at 22:40
  • I suggest installing antix: sourceforge.net/projects/antix-linux/files/Final/MX-14.4/… – kyodake Nov 6 '15 at 22:45
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The generic default kernel (in 12.10 and onwards) already has PAE enabled. Therefore I don't see it as being a risky thing to do. Just grab the most up-to-date version of Ubuntu and enjoy.

Source: https://help.ubuntu.com/community/PAE/Enabling

According to a commenter, this machine only has 512 MB of RAM available to it. Physical Address Extension is only useful if you have more than 4 GB of RAM

Source: en.wikipedia.org/wiki/Physical_Address_Extension

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    After Googling the OP laptop, they only have 512mb of RAM and therefore should not force PAE as it is in no way beneficial and may cause issues. – Mark Kirby Nov 6 '15 at 22:42
  • Please don't think im saying your answer is wrong, you should leave it here as for others this will be useful :) Here is OP specs engadget.com/products/dell/inspiron/8600/specs – Mark Kirby Nov 6 '15 at 22:47
  • I did leave the original reply intact, just appended additional information to make it more useful to the OP and to other readers who have similar questions. – Aren Nov 6 '15 at 22:49

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