screen blue

appears that in windbg:
Microsoft (R) Windows Debugger Version 6.12.0002.633 X86
Copyright (c) Microsoft Corporation. All rights reserved.

Loading Dump File [C:\Users\paulao\Downloads\MEMORY.DMP]
Kernel Summary Dump File: Only kernel address space is available
Symbol search path is: *** Invalid ***
****************************************************************************
* Symbol loading may be unreliable without a symbol search path. *
* Use .symfix to have the debugger choose a symbol path. *
* After setting your symbol path, use .reload to refresh symbol locations. *
****************************************************************************
Executable search path is:
*********************************************************************
* Symbols can not be loaded because symbol path is not initialized. *
* *
* The Symbol Path can be set by: *
* using the _NT_SYMBOL_PATH environment variable. *
* using the -y <symbol_path> argument when starting the debugger. *
* using .sympath and .sympath+ *
*********************************************************************
*** ERROR: Symbol file could not be found. Defaulted to export symbols for ntkrpamp.exe -
Windows 7 Kernel Version 7601 (Service Pack 1) MP (2 procs) Free x86 compatible
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7601.17790.x86fre.win7sp1_gdr.120305-1505
Machine Name:
Kernel base = 0x8280c000 PsLoadedModuleList = 0x829554d0
Debug session time: Tue May 1 21:34:34.182 2012 (UTC + 1:00)
System Uptime: 0 days 10:21:57.995
*********************************************************************
* Symbols can not be loaded because symbol path is not initialized. *
* *
* The Symbol Path can be set by: *
* using the _NT_SYMBOL_PATH environment variable. *
* using the -y <symbol_path> argument when starting the debugger. *
* using .sympath and .sympath+ *
*********************************************************************
*** ERROR: Symbol file could not be found. Defaulted to export symbols for ntkrpamp.exe -
Loading Kernel Symbols
...............................................................
................................................................
..................
Loading User Symbols
PEB is paged out (Peb.Ldr = 7ffde00c). Type ".hh dbgerr001" for details
Loading unloaded module list
.....


can you help me thanks

You did not provide WinDbg with the online symbols path. Even if you had, there is no guarantee there would have been enough information for us to help you. It is better to get the full crash reports so we can analyze them.

Please provide us with the full crash reports by following the http://www.sevenforums.com/crashes-debugging/96879-blue-screen-death-bsod-posting-instructions.html so we can give specific troubleshooting steps.