Windows7 Ultimate BlueScreen BCCode 7a

OS - Windows 7 Ultimate 32-bit SP1
Original OS - Windows Wista 32-bit
The OS came pre-installed on the system(OEM)
Age of system - ~6 years
Age of the OS - ~5 years
CPU - Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
Video card - NVIDIA GeForce 8600M GS
Motherboard - Fujitsu Siemens Amilo Xi 2428
Laptop or Desktop? Laptop
 
Code: 
[COLOR=#ff0000]BugCheck 7A[/COLOR], {c04270c0, [COLOR=#008000]c0000185[/COLOR], 7682860, 84e189ce}

Probably caused by : [COLOR=#ff0000]memory_corruption[/COLOR]

Code: 
0: kd> [COLOR=#008000]!error 0xc0000185 [/COLOR]
Error code: (NTSTATUS) 0xc0000185 (3221225861) - The I/O device reported an I/O error.

Code: 
[COLOR=#008000]!chkimg -lo 50 -d !ataport[/COLOR]
    84e18000-84e18006  7 bytes - ataport!DeviceAllocatePdoCallBack+34
    [ 8a 48 01 88 8e 10 03:00 00 00 00 00 00 00 ]
    84e18009 - ataport!DeviceAllocatePdoCallBack+3d (+0x09)
    [ 8a:00 ]
    84e1800b-84e1800d  3 bytes - ataport!DeviceAllocatePdoCallBack+3f (+0x02)
    [ 83 8e d8:00 00 00 ]
    84e18011-84e18015  5 bytes - ataport!DeviceAllocatePdoCallBack+45 (+0x06)
    [ ff 83 8e 40 02:00 00 00 00 00 ]
    84e18018-84e1801c  5 bytes - ataport!DeviceAllocatePdoCallBack+4c (+0x07)
    [ ff 88 86 11 03:00 00 00 00 00 ]
    84e1801f-84e18022  4 bytes - ataport!DeviceAllocatePdoCallBack+53 (+0x07)
    [ 8d 86 78 02:00 00 00 00 ]
    84e18025-84e18028  4 bytes - ataport!DeviceAllocatePdoCallBack+59 (+0x06)
    [ 89 86 74 02:00 00 00 00 ]
    84e1802b-84e1802e  4 bytes - ataport!DeviceAllocatePdoCallBack+5f (+0x06)
    [ 8d 86 30 01:00 00 00 00 ]
    84e18031-84e18036  6 bytes - ataport!DeviceAllocatePdoCallBack+65 (+0x06)
    [ 33 db 50 89 9e d4:00 00 00 00 00 00 ]
    84e1803a-84e1803d  4 bytes - ataport!DeviceAllocatePdoCallBack+6e (+0x09)
    [ 89 9e 70 02:00 00 00 00 ]
    84e18040-84e18048  9 bytes - ataport!DeviceAllocatePdoCallBack+74 (+0x06)
    [ e8 7d f5 ff ff 8d 86 30:00 00 00 00 00 00 00 00 ]
    84e1804b-84e1804f  5 bytes - ataport!DeviceAllocatePdoCallBack+7f (+0x0b)
    [ 56 89 40 04 89:00 00 00 00 00 ]
    84e18051-84e18059  9 bytes - ataport!DeviceAllocatePdoCallBack+85 (+0x06)
    [ e8 74 31 ff ff 56 e8 1e:00 00 00 00 00 00 00 00 ]
    84e1805c-84e18064  9 bytes - ataport!DeviceAllocatePdoCallBack+90 (+0x0b)
    [ 53 68 49 72 62 4c 68 f0:00 00 00 00 00 00 00 00 ]
    84e18067-84e1806c  6 bytes - ataport!DeviceAllocatePdoCallBack+9b (+0x0b)
    [ 53 53 53 8d 86 e0:00 00 00 00 00 00 ]
    84e18070-84e18080  17 bytes - ataport!DeviceAllocatePdoCallBack+a4 (+0x09)
    [ 50 ff 15 fc 11 e1 84 56:00 00 00 00 00 00 00 00 ]
    84e18083-84e180b3  49 bytes - ataport!DeviceAllocatePdoCallBack+b7 (+0x13)
    [ 50 e8 af ca ff ff 56 e8:00 00 00 00 00 00 00 00 ]
    84e180b5-84e180d8  36 bytes - ataport!DeviceAllocatePdoCallBack+e9 (+0x32)
    [ cc cc cc cc cc 8b ff 55:00 00 00 00 00 00 00 00 ]
    84e180da-84e180f6  29 bytes - ataport!DeviceFreePdo+20 (+0x25)
    [ cc cc cc cc cc cc 8b ff:00 00 00 00 00 00 00 00 ]
    84e180f8-84e18111  26 bytes - ataport!DeviceStopDevice+18 (+0x1e)
    [ cc cc cc cc cc cc 8b ff:00 00 00 00 00 00 00 00 ]
    84e18114-84e18122  15 bytes - ataport!DeviceRemoveDevice+16 (+0x1c)
    [ 50 e8 90 f4 ff ff 56 e8:00 00 00 00 00 00 00 00 ]
    84e18126-84e18137  18 bytes - ataport!DeviceRemoveDevice+28 (+0x12)
    [ 3c 04 73 22 53 32 db 84:00 00 00 00 00 00 00 00 ]
    84e1813b-84e18145  11 bytes - ataport!DeviceRemoveDevice+3d (+0x15)
    [ 56 e8 af f9 ff ff fe c3:00 00 00 00 00 00 00 00 ]
    84e18149-84e1814c  4 bytes - ataport!DeviceRemoveDevice+4b (+0x0e)
    [ 72 e6 5b 6a:00 00 00 00 ]
    84e1814e-84e18151  4 bytes - ataport!DeviceRemoveDevice+50 (+0x05)
    [ 56 e8 c6 1e:00 00 00 00 ]
    84e18154-84e18165  18 bytes - ataport!DeviceRemoveDevice+56 (+0x06)
    [ 56 e8 ae f9 ff ff 6a 08:00 00 00 00 00 00 00 00 ]
    84e18168-84e1818a  35 bytes - ataport!DeviceRemoveDevice+6a (+0x14)
    [ 56 e8 ba f9 ff ff a1 04:00 00 00 00 00 00 00 00 ]
    84e1818d-84e18193  7 bytes - ataport!DeviceRemoveDevice+8f (+0x25)
    [ 56 51 0f b6 8e 10 03:00 00 00 00 00 00 00 ]
    84e18196-84e1819b  6 bytes - ataport!DeviceRemoveDevice+98 (+0x09)
    [ 51 0f b6 8f 48 11:00 00 00 00 00 00 ]
    84e1819e-84e181a3  6 bytes - ataport!DeviceRemoveDevice+a0 (+0x08)
    [ 51 0f b6 8f 50 11:00 00 00 00 00 00 ]
    84e181a6-84e181bc  23 bytes - ataport!DeviceRemoveDevice+a8 (+0x08)
    [ 51 68 84 17 e1 84 6a 0a:00 00 00 00 00 00 00 00 ]
    84e181bf-84e181c5  7 bytes - ataport!DeviceRemoveDevice+c1 (+0x19)
    [ 5f 33 c0 5e 5d c2 08:00 00 00 00 00 00 00 ]
    84e181c7-84e181e5  31 bytes - ataport!DeviceRemoveDevice+c9 (+0x08)
    [ cc cc cc cc cc 8b ff 55:00 00 00 00 00 00 00 00 ]
    84e181e8-84e181fc  21 bytes - ataport!DeviceQueryDeviceCapabilities+1c (+0x21)
    [ 0f b7 76 0c 83 e6 08 03:00 00 00 00 00 00 00 00 ]
    84e181ff-84e18206  8 bytes - ataport!DeviceQueryDeviceCapabilities+33 (+0x17)
    [ 89 70 04 0f b6 89 11 03:00 00 00 00 00 00 00 00 ]
    84e18209-84e18220  24 bytes - ataport!DeviceQueryDeviceCapabilities+3d (+0x0a)
    [ 0f b6 32 c1 e1 04 83 e6:00 00 00 00 00 00 00 00 ]
    84e18222-84e18230  15 bytes - ataport!DeviceQueryDeviceCapabilities+56 (+0x19)
    [ 89 48 34 89 48 38 89 48:00 00 00 00 00 00 00 00 ]
    84e18232-84e1824f  30 bytes - ataport!DeviceQueryDeviceCapabilities+66 (+0x10)
    [ cc cc cc cc cc cc 8b ff:00 00 00 00 00 00 00 00 ]
    84e18252-84e18259  8 bytes - ataport!ChannelFilterResourceRequirements+1a (+0x20)
    [ 01 89 7d e4 0f 84 18 02:00 00 00 00 00 00 00 00 ]
    84e1825c-84e1825e  3 bytes - ataport!ChannelFilterResourceRequirements+24 (+0x0a)
    [ 83 7e 18:00 00 00 ]
    84e18260-84e1827a  27 bytes - ataport!ChannelFilterResourceRequirements+28 (+0x04)
    [ 7c 08 8b 5e 1c 89 5d fc:00 00 00 00 00 00 00 00 ]
    84e1827d-84e18285  9 bytes - ataport!ChannelFilterResourceRequirements+45 (+0x1d)
    [ 8b 43 1c 85 c0 0f 84 ec:00 00 00 00 00 00 00 00 ]
    84e18288-84e1829d  22 bytes - ataport!ChannelFilterResourceRequirements+50 (+0x0b)
    [ 8d 4d 08 51 6a 20 59 f7:00 00 00 00 00 00 00 00 ]
    84e182a0-84e182b3  20 bytes - ataport!ChannelFilterResourceRequirements+68 (+0x18)
    [ 8d 45 08 50 ff 33 ff 75:00 00 00 00 00 00 00 00 ]
    84e182b6-84e182ce  25 bytes - ataport!ChannelFilterResourceRequirements+7e (+0x16)
    [ 68 49 64 65 50 ff 75 08:00 00 00 00 00 00 00 00 ]
    84e182d1-84e182d3  3 bytes - ataport!ChannelFilterResourceRequirements+99 (+0x1b)
    [ 83 65 ec:00 00 00 ]
    84e182d5-84e182e8  20 bytes - ataport!ChannelFilterResourceRequirements+9d (+0x04)
    [ 6a 12 8b f3 59 8b f8 f3:00 00 00 00 00 00 00 00 ]
    84e182ea-84e182f6  13 bytes - ataport!ChannelFilterResourceRequirements+b2 (+0x15)
    [ 8d 73 20 89 75 f0 8d 58:00 00 00 00 00 00 00 00 ]
    84e182f9-84e1834c  84 bytes - ataport!ChannelFilterResourceRequirements+c1 (+0x0f)
    [ eb 03 8b 75 f0 8b 4e 04:00 00 00 00 00 00 00 00 ]
    84e1834e-84e18381  52 bytes - ataport!ChannelFilterResourceRequirements+116 (+0x55)
    [ 75 08 8d 48 f8 89 4d 08:00 00 00 00 00 00 00 00 ]
WARNING: !chkimg output was truncated to 50 lines. Invoke !chkimg without '-lo [num_lines]' to view  entire output.
[COLOR=#ff0000]3652 errors[/COLOR] : !ataport (84e18000-84e18fff)

There is most likely something wrong with your hard-drive, especially with the age of your system and being a laptop. I would suggest you run some hardware diagonstics, and then report back on the results - https://www.sysnative.com/forums/hardware-tutorials/4072-hard-drive-hdd-diagnostics.html
 
Could you please also upload a Kernel Memory Dump? It can be found here:

Code: 
C:\Windows\MEMORY.DMP

I would suggest uploading the file in a zipped folder to a file sharing site such as Dropbox or OneDrive (SkyDrive), and then posting a link to the file in your next post.
 
It seems to have failed both of the hard-drive tests, I would backing up any important files (Pictures, Videos etc.) onto a USB memory stick or some other medium. I would suggest looking for replacement hard drive as soon as possible, or getting a new laptop if it is more cost effective.
 

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