Vista Ultimate unable to support 4GB RAM for Notebooks

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Guest

I just upgraded my Acer Aspire 5100 to windows Vista Ultimate and replaced
1GB RAM (2x 512MB) with 4 GB cards (2x 2GB). It stopped in the middle of the
booting sequence. I installed the two 512MBs back, it worked again. I tried
to log it in ntbootlg.txt and checked the difference, and I noticed that the
crash happened between cdfs.sys and ntkrnlpa.exe. I strongly believe it's
ntkrnlpa.

Safe Mode boots up fine with the 4GB cards in it.

I have 'Another' Acer Aspire 5100 but with Windows Home Premium and placed
the same 4GB cards in it, it worked perfectly without the stuck up.


I do not know who can fix this; Microsoft? Acer, the manufacturer? it's
unlikely but I'm thinking the memory card manufacturer? I have no support
options to send this problem to.
 
Actually, that support link is for computers that has more than 3GB of RAM
already installed and you're just about to install Vista.

My problem is Vista Ultimate IS already installed and running satisfactory
in 1GB of RAM, and I just installed the 4GB but it crashes on bootup. I
already tried putting in only half of the 2GB, and it still crashes.

I have two notebooks. Both are Aspire 5100. The 4GB cards work fine in a
same model of notebook but with Home Premium installed. There is no Error
code or whatsoever. It just, STOPS. Even the bootlog does not display any
error messages. It just writes down half of the normal boot sequence.
 
Assuming you have applied all relevant Windows Updates so the memory fix is
installed, the problem is either with the memory or with one of your
drivers.

Try memtest or similar on the Home Premium machine with the 4GB to check
that the memory is good.
 
Are both laptops using the same BIOS release?

vernardm said:
Actually, that support link is for computers that has more than 3GB of RAM
already installed and you're just about to install Vista.

My problem is Vista Ultimate IS already installed and running satisfactory
in 1GB of RAM, and I just installed the 4GB but it crashes on bootup. I
already tried putting in only half of the 2GB, and it still crashes.

I have two notebooks. Both are Aspire 5100. The 4GB cards work fine in a
same model of notebook but with Home Premium installed. There is no Error
code or whatsoever. It just, STOPS. Even the bootlog does not display any
error messages. It just writes down half of the normal boot sequence.
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