Windows 7 BSOD ntoskrnl.exe

Hello, Today my coumputer starts crashing.. i realy dont know how to fix it :/ Can you help me, please ? And where to send my minidump ?

Edit: http://leteckaposta.cz/110227856 <-- Minidump folder
==================================================
Dump File : 070715-36909-01.dmp
Crash Time : 7.7.2015 12:44:36
Bug Check String : IRQL_NOT_LESS_OR_EQUAL
Bug Check Code : 0x0000000a
Parameter 1 : 00000000`00000028
Parameter 2 : 00000000`00000002
Parameter 3 : 00000000`00000000
Parameter 4 : fffff800`02cd3720
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+748c0
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7601.18869 (win7sp1_gdr.150525-0603)
Processor : x64
Crash Address : ntoskrnl.exe+748c0
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\070715-36909-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 7601
Dump File Size : 318 415
Dump File Time : 7.7.2015 12:45:26
==================================================

==================================================
Dump File : 070715-28392-01.dmp
Crash Time : 7.7.2015 9:02:33
Bug Check String : BAD_POOL_HEADER
Bug Check Code : 0x00000019
Parameter 1 : 00000000`00000022
Parameter 2 : fffff8a0`0693a000
Parameter 3 : 00000000`00000001
Parameter 4 : 00000000`00000000
Caused By Driver : ntoskrnl.exe
Caused By Address : ntoskrnl.exe+748c0
File Description : NT Kernel & System
Product Name : Microsoft® Windows® Operating System
Company : Microsoft Corporation
File Version : 6.1.7601.18869 (win7sp1_gdr.150525-0603)
Processor : x64
Crash Address : ntoskrnl.exe+748c0
Stack Address 1 :
Stack Address 2 :
Stack Address 3 :
Computer Name :
Full Path : C:\Windows\Minidump\070715-28392-01.dmp
Processors Count : 2
Major Version : 15
Minor Version : 7601
Dump File Size : 318 415
Dump File Time : 7.7.2015 9:38:36
==================================================