Frequent BSOD's

i hav also got the following blue screen

0x0000007F( 0X0000000D, 0X00000000, 0X00000000, 0X00000000)

any other messages that come along with those?

how frequent is this incident? what was your usual activity by the time you encounter BSODs?

I hav also got the following messages

PAGE FAULT IN NON PAGED AREA
0x00000050 ( 0x9F71FA80, 0x00000000, 0xBD5B0DA2, 0x00000000)
NV4_disp.dll- ADDRESS....



0x0000008E (0xC0000005, 0xF377DD52, 0xB8743A80, 0X00000000,
klif.sys......


I atleast get 10 to 15 of them daily....
it need not be any particular activity.....
it can just listening to music using windows media player, browising, downloading or playing a game for 3 or 4 mins

so please help me...
i have changed my RAM and Motherboard ecause of these bluescreens... so giv me solution i have also udated the BIOS

I hav also got the following messages

PAGE FAULT IN NON PAGED AREA
0x00000050 ( 0x9F71FA80, 0x00000000, 0xBD5B0DA2, 0x00000000)
NV4_disp.dll- ADDRESS....



0x0000008E (0xC0000005, 0xF377DD52, 0xB8743A80, 0X00000000,
klif.sys......


I atleast get 10 to 15 of them daily....
it need not be any particular activity.....
it can just listening to music using windows media player, browising, downloading or playing a game for 3 or 4 mins

so please help me...
i have changed my RAM and Motherboard ecause of these bluescreens... so giv me solution i have also udated the BIOS

One of those is an nvidia driver failure, the other is related to Kaspersky antivirus software.

Tried doing a fresh driver installation?

Also tried re-installing Kaspersky?

thanks i will try these things and reply with the result