BSOD - for the past two days

i have an old pc with following specs

Pentium 4 2.66 GHz
DDR Ram 1.5 gb at 400 MHz
2x 500 gb Seagate Barracuda HDD. 7200.11 and 7200.12
Intel D101Ggc Motherboard

the system is running on Windows 7 Ultimate Ed. 32 Bit

for the past 2 days i have been getting regular BSOD indicating NETIO.SYS at the bottom of the page.
while searching other forums regarding this i found out that this may be due to antivirus i am using. then i uninstalled my norton 360 av and switched to Microsoft Security Essentials but still BSOD keeps on appearing.
I have attached two zip archives (with instructions also in 2nd archive) that contain the minidump files as well as the performance report.
hope anyone can help me get a solution.

thanks in advance

just had another BSOD and i think the problem arises whenever i play a video file on my pc. the details are


Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: d1
BCP1: 00000000
BCP2: 00000002
BCP3: 00000000
BCP4: 89043EA1
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\121311-33953-01.dmp
C:\Users\Nishant\AppData\Local\Temp\WER-92218-0.sysdata.xml

Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

help someone

getting quite desperate here. :/

another bsod. this time on leaving the system idle.
details are

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: d1
BCP1: 7EC89134
BCP2: 00000002
BCP3: 00000000
BCP4: 89036555
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\121311-42296-01.dmp
C:\Users\Nishant\AppData\Local\Temp\WER-332296-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

this time not due to netio.sys but couldn't read it in time.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: 116
BCP1: 85DD0510
BCP2: 8EFA787A
BCP3: C000009A
BCP4: 00000004
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\121411-37140-01.dmp
C:\Users\Nishant\AppData\Local\Temp\WER-388640-0.sysdata.xml

Read our privacy statement online:
Windows 7 Privacy Statement - Microsoft Windows

If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt