Below are the texts of the four last blue screens on 12/9/2012.
That day I decided to do a memory test, which didn't pass.
I changed my memory chips and I have no more blue screens since then.
(But I cannot update)
A problem has been detected and Windows has been shut down to prevent damage
to your computer.
The problem seems to be caused by the following file: ntoskrnl.exe
MEMORY_MANAGEMENT
If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:
Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.
Technical Information:
*** STOP: 0x0000001a (0x0000000000041201, 0xfffff68000058870, 0x888000b797ab1867,
0xfffffa801473b160)
*** ntoskrnl.exe - Address 0xfffff80002ecd1c0 base at 0xfffff80002e4e000 DateStamp
0x4fa390f3
A problem has been detected and Windows has been shut down to prevent damage
to your computer.
The problem seems to be caused by the following file: Ntfs.sys
MEMORY_MANAGEMENT
If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:
Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.
Technical Information:
*** STOP: 0x0000001a (0x0000000000041790, 0xfffffa800a067a30, 0x000000000000ffff,
0x0000000000000000)
*** Ntfs.sys - Address 0xfffff880014ef990 base at 0xfffff8800144b000 DateStamp
0x4d79997b
A problem has been detected and Windows has been shut down to prevent damage
to your computer.
The problem seems to be caused by the following file: ntoskrnl.exe
MEMORY_MANAGEMENT
If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:
Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.
Technical Information:
*** STOP: 0x0000001a (0x0000000000005002, 0xfffff70001080000, 0x0000000000000547,
0x000005c2fffffffe)
*** ntoskrnl.exe - Address 0xfffff80002e951c0 base at 0xfffff80002e16000 DateStamp
0x4fa390f3
A problem has been detected and Windows has been shut down to prevent damage
to your computer.
The problem seems to be caused by the following file: ntoskrnl.exe
MEMORY_MANAGEMENT
If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:
Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.
If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.
Technical Information:
*** STOP: 0x0000001a (0x0000000000041790, 0xfffffa8004c36fb0, 0x000000000000ffff,
0x0000000000000000)
*** ntoskrnl.exe - Address 0xfffff80002e9e1c0 base at 0xfffff80002e1f000 DateStamp
0x4fa390f3