BSOD while playing games high setting or alt tabbing (ntoskrnl.exe+71f00)

I need help i am experiencing blue screen after playing insurgency with 1920x1080 resolution with high settings. or alt tabbing csgo while browsing the internet. here are the 5 errors. Please help me. thx.

These are my specs


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Dump File : 051415-6474-01.dmp
Crash Time : 5/14/2015 9:23:07 PM
Bug Check String : PAGE_FAULT_IN_NONPAGED_AREA
Bug Check Code : 0x00000050
Parameter 1 : fffff900`c21967a0
Parameter 2 : 00000000`00000000
Parameter 3 : fffff960`0076dc51
Parameter 4 : 00000000`00000000
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+71f00
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\051415-6474-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 370,784
Dump File Time : 5/14/2015 9:23:41 PM
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Dump File : 052815-7098-01.dmp
Crash Time : 5/28/2015 2:33:10 PM
Bug Check String : PAGE_FAULT_IN_NONPAGED_AREA
Bug Check Code : 0x00000050
Parameter 1 : fffff900`c07bc7a0
Parameter 2 : 00000000`00000000
Parameter 3 : fffff960`007adc51
Parameter 4 : 00000000`00000000
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+71f00
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7600.16385 (win7_rtm.090713-1255)
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\052815-7098-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 355,784
Dump File Time : 5/28/2015 2:33:46 PM
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Dump File : 051415-7269-01.dmp
Crash Time : 5/14/2015 8:57:38 PM
Bug Check String : SYSTEM_SERVICE_EXCEPTION
Bug Check Code : 0x0000003b
Parameter 1 : 00000000`c0000005
Parameter 2 : fffff960`00134283
Parameter 3 : fffff880`08ec8020
Parameter 4 : 00000000`00000000
Caused By Driver : win32k.sys
Caused By Address : win32k.sys+c4283
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\051415-7269-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 359,280
Dump File Time : 5/14/2015 8:58:16 PM
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Dump File : 051715-6146-01.dmp
Crash Time : 5/17/2015 11:10:17 PM
Bug Check String : SYSTEM_SERVICE_EXCEPTION
Bug Check Code : 0x0000003b
Parameter 1 : 00000000`c0000005
Parameter 2 : fffff960`00164283
Parameter 3 : fffff880`091d6020
Parameter 4 : 00000000`00000000
Caused By Driver : win32k.sys
Caused By Address : win32k.sys+c4283
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\051715-6146-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 357,184
Dump File Time : 5/17/2015 11:10:51 PM
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Dump File : 052715-7768-01.dmp
Crash Time : 5/27/2015 1:20:01 PM
Bug Check String : SYSTEM_SERVICE_EXCEPTION
Bug Check Code : 0x0000003b
Parameter 1 : 00000000`c0000005
Parameter 2 : fffff960`00144283
Parameter 3 : fffff880`0977e020
Parameter 4 : 00000000`00000000
Caused By Driver : win32k.sys
Caused By Address : win32k.sys+c4283
File Description :
Product Name :
Company :
File Version :
Processor : x64
Crash Address : ntoskrnl.exe+71f00
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\052715-7768-01.dmp
Processors Count : 4
Major Version : 15
Minor Version : 7600
Dump File Size : 373,288
Dump File Time : 5/27/2015 1:20:37 PM
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