Frequent BSOD doing normal work

[abhaydeep2012]

PAGE_FAULT_IN_NONPAGED_AREA ntoskrnl.exe

This was probably caused by the following module: ntoskrnl.exe (nt+0x71F00)
Bugcheck code: 0x50 (0xFFFFF8A00B966000, 0x0, 0xFFFFF80003543079, 0x0)
Error: PAGE_FAULT_IN_NONPAGED_AREA
file path: C:\Windows\system32\ntoskrnl.exe

I have a desktop assembled 2.5 years ago.
yesterday one of my 2gb ram got faulty. I removed & the system worked fine for a day. but today again blue screen appeared stating the same reasons which I got before with the faulty ram. I have attached the files according to the procedure.
My system specs -
Processor:core 2 duo E7500 @2.93 GHZ,
4GB DDR2 RAM,
NVIDIA 9600GT 512mb graphics card,
320GB Ssamsung sata hard drive@ 7200rpm,
iball LPS 223-400(250w) PSU power supply
One ram has gone bad 6 months earlier also. I got it replaced.
Since I doesn't have a UPS, So did the ram has gone bad due to some sudden power offs again & again. Please suggest me what should I do.

 

[abhaydeep2012]

Here is some more info:
This was probably caused by the following module: ntoskrnl.exe (nt+0x71F00)
Bugcheck code: 0x50 (0xFFFFF8A00B966000, 0x0, 0xFFFFF80003543079, 0x0)
Error: PAGE_FAULT_IN_NONPAGED_AREA
file path: C:\Windows\system32\ntoskrnl.exe

 

[HonorGamer]

Hello,

Start Menu\Programs\DAEMON Tools Lite	Public:Start Menu\Programs[B][COLOR="red"]\DAEMON Tools Lite[/COLOR][/B]
[B][COLOR="red"]dtsoftbus01.sys[/COLOR][/B] Fri Jan 13 07:45:46 2012 (4F10358A) --- Daemon Tools Driver

Daemon Tools are known to cause problems such as BSODs. Please uninstall completely.

Probably caused by : [B][COLOR="Red"]memory_corruption[/COLOR][/B]

ALL of the dump files are blaming this. Please run a http://www.sevenforums.com/tutorials/105647-ram-test-memtest86.html to make sure you do not have faulty RAM.

After finished, please post back results.

-Justin