I am getting all kinds of blue screen errors!!pls help

[tango_cash]

hi ppl my config is

Intel P4 2.8gz with H.T
915GAV Intel orignal mobo
2.5gb of DDR1 ram
250gb+320gb sata hdd.
1 Sony DVD writer
1 LG CD writer
Mercury 8600GT 256MB DDR3.

the problem is that i am getting all kinds of blue screen errors.they just happen anytime.
it does not depend what i am doing. i may play games,watch a movie or the p.c is just idle, the blue screen happens anytime.
they also come in a variety.
i have added the graphic card recently. but even when i remove it i get the errors.i even went to the vendor and got my graphic card replaced but still i get the errors.
i downloaded the new drivers from nvidia site but still there is problem.i even downloaded drivers from palit website but still got error.
here is the list of the errors-

1. this is the first one i got
A problem has been detected and Windows has been shut down to prevent
damage to your computer.
IRQL-------NOT-----LESS----OR---EQUAL
If this is the first time you have 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 a safe mode
to remove or disable components, restart your computer and press F-8 to
select advanced startup options, and then select safe mode."
Tech Information
Stop 0x000000D1(0x00000008,0x00000002,0x00000000,0xF743 BBEF)
NDIS.SYS-Address F743BBEF base at F7425000, datestamp 41107ec3
Beginning dump of physical memory.
Physical memory dump complete.
Contact your system administrator or Technical support group for further assistance

2. everything was same except
STOP: 0x0000008E(0xC0000005,0xBFA8E058,0XB014DA84,0X0000 0000)
nv4_disp.dll-Adress BFA8E058 base at BF9D3000, Datestamp 482dff70

3. it was about WIN32K.SYS.

4. BAD_POOL_HEADER
STOP: 0x00000019(0x00000020,0xE3440CA0,0xE3441698,0x0D3F 2821)

5. NTFS.SYS
STOP:0x000000BE(0xE3672168,0x28150900,0xA9F045CC,0 x0000000E)
NTFS.SYS- Adress F7B8BDD5 base at F7352000, Datestamp 41107eea.

6. TCPIP.SYS

at first i used to get NDIS.SYS error but later on i got all the above.
windows also gave error at starting that"windows has recovered from serious error"
i am attaching the dump files.
pls help i am going crazy with these.

[dheeraj_kumar]

NDIS.SYS

Thats your network interface driver.

nv4_disp.dll

Thats your nvidia display driver.

WIN32K.SYS

Thats your core windows driver, which is the base for all kernel mode operations.

NTFS.SYS

Thats your ntfs filesystem driver.

TCPIP.SYS

Thats your tcp/ip protocol driver, which is the base for connecting to net etc.

Nothing can help you except a clean reinstall of windows. Several core windows drivers are corrupt, and even repairing windows may be buggy for you. Others may suggest using an antivirus, blah blah, but this is the only guarenteed solution I can give you. Format the C drive and reinstall windows.

[abhi.eternal]

Go to the following link to know exactly what are the errors about:

http://aumha.org/a/stop.htm

Looks like you will have to start searching for your OS disc!

[boom2709]

there might be some complex solutions to fix your problems but the best option is to simply reinstall your windows, takes 20-25 mins and all the problems just vanish away!

[R2K]

try replacing ram modules