freezing + BSOD

Hello!

Brief summary of the issues: for about the last two months, my computer has acquired the tendency to freeze at random times. Sometimes, after several seconds or a minute, everything will seemingly go back to working. In other instances, hitting CTRL+ALT+DEL seems to work (though it could be that it just makes the time pass). More often, the screen stays frozen indefinitely and I resort to just switching it off. If any sort of audio is playing when this happens, it turns into a stuttering, pitched down drone - regardless of the audio source (VLC, iTunes, youtube, etc).

As far as I can tell, it doesn't matter what programmes are open or how long the computer has been running. Sometimes it occurs at start up, sometimes several hours after the PC is turned on; sometimes once a day, at other times every few minutes. Also, in regards to start-ups - quite often the computer will freeze then. It also frequently doesn't shut down.

Below are the basic specs and the attachment contains all the info mentioned in the posting instructions:

Windows 7 x64
- not the original installed OS on the system (that was Vista)
- retail version
- age of system: 3 years
- age of OS installation: 6 months


Thank you for all your time in advance,
ey

   Information

Please remove any CD virtualization programs such as Daemon Tools and Alcohol 120%. They use a driver, found in your dmp, sptd.sys, that caused BSODs. Use this SPTD uninstaller when you're done: DuplexSecure - Downloads
You can use MagicDisc as an alternative.

Code:

sptd.sys        fffff880`00e06000    fffff880`00f63000    0x0015d000    0x4c7362f8    24/08/2010 10:13:12

Code:

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck D1, {30, 2, 0, fffff88001002bad}

Unable to load image \SystemRoot\System32\Drivers\sptd.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for sptd.sys
*** ERROR: Module load completed but symbols could not be loaded for sptd.sys
Probably caused by : storport.sys ( storport!RaUnitAsyncError+13d )


DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)
An attempt was made to access a pageable (or completely invalid) address at an
interrupt request level (IRQL) that is too high.  This is usually
caused by drivers using improper addresses.
If kernel debugger is available get stack backtrace.
Arguments:
Arg1: 0000000000000030, memory referenced
Arg2: 0000000000000002, IRQL
Arg3: 0000000000000000, value 0 = read operation, 1 = write operation
Arg4: fffff88001002bad, address which referenced memory

Debugging Details:
------------------


READ_ADDRESS: GetPointerFromAddress: unable to read from fffff80002f020e0
 0000000000000030 

CURRENT_IRQL:  2

FAULTING_IP: 
storport!RaUnitAsyncError+13d
fffff880`01002bad 488b5d30        mov     rbx,qword ptr [rbp+30h]

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  VISTA_DRIVER_FAULT

BUGCHECK_STR:  0xD1

PROCESS_NAME:  System

TRAP_FRAME:  fffff80000b9c8c0 -- (.trap 0xfffff80000b9c8c0)
NOTE: The trap frame does not contain all registers.
Some register values may be zeroed or incorrect.
rax=fffffa80029ac610 rbx=0000000000000000 rcx=fffff88001004ca6
rdx=fffff88001000000 rsi=0000000000000000 rdi=0000000000000000
rip=fffff88001002bad rsp=fffff80000b9ca50 rbp=0000000000000000
 r8=fffff80000b9ca20  r9=fffffa8003af9d78 r10=fffffa8002517b20
r11=0000000000000002 r12=0000000000000000 r13=0000000000000000
r14=0000000000000000 r15=0000000000000000
iopl=0         nv up ei ng nz na pe cy
storport!RaUnitAsyncError+0x13d:
fffff880`01002bad 488b5d30        mov     rbx,qword ptr [rbp+30h] ss:0018:00000000`00000030=????????????????
Resetting default scope

LAST_CONTROL_TRANSFER:  from fffff80002cc9ca9 to fffff80002cca740

STACK_TEXT:  
fffff800`00b9c778 fffff800`02cc9ca9 : 00000000`0000000a 00000000`00000030 00000000`00000002 00000000`00000000 : nt!KeBugCheckEx
fffff800`00b9c780 fffff800`02cc8920 : fffffa80`01df2000 fffffa80`03af9d78 00000000`00000000 fffffa80`00000000 : nt!KiBugCheckDispatch+0x69
fffff800`00b9c8c0 fffff880`01002bad : fffffa80`03af9d78 fffffa80`03af9d78 00000000`00000000 fffffa80`02517b20 : nt!KiPageFault+0x260
fffff800`00b9ca50 fffff880`01002869 : fffffa80`02517b20 00000000`00000001 fffffa80`000000fe fffffa80`02511128 : storport!RaUnitAsyncError+0x13d
fffff800`00b9cb30 fffff880`010028d3 : fffffa80`00000000 00000000`000000fe fffffa80`016f57e8 fffffa80`02511128 : storport!RaidUnitCompleteRequest+0x399
fffff800`00b9cc10 fffff880`00e4cae8 : fffffa80`016f5000 fffffa80`00000002 fffffa80`02511100 fffff800`00b9ccc8 : storport!RaidpAdapterDpcRoutine+0x53
fffff800`00b9cc50 fffffa80`016f5000 : fffffa80`00000002 fffffa80`02511100 fffff800`00b9ccc8 00000000`00000000 : sptd+0x46ae8
fffff800`00b9cc58 fffffa80`00000002 : fffffa80`02511100 fffff800`00b9ccc8 00000000`00000000 fffffa80`016f57d8 : 0xfffffa80`016f5000
fffff800`00b9cc60 fffffa80`02511100 : fffff800`00b9ccc8 00000000`00000000 fffffa80`016f57d8 fffff880`00000064 : 0xfffffa80`00000002
fffff800`00b9cc68 fffff800`00b9ccc8 : 00000000`00000000 fffffa80`016f57d8 fffff880`00000064 fffffa80`02dd5a50 : 0xfffffa80`02511100
fffff800`00b9cc70 00000000`00000000 : fffffa80`016f57d8 fffff880`00000064 fffffa80`02dd5a50 00000000`00000000 : 0xfffff800`00b9ccc8


STACK_COMMAND:  kb

FOLLOWUP_IP: 
storport!RaUnitAsyncError+13d
fffff880`01002bad 488b5d30        mov     rbx,qword ptr [rbp+30h]

SYMBOL_STACK_INDEX:  3

SYMBOL_NAME:  storport!RaUnitAsyncError+13d

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: storport

IMAGE_NAME:  storport.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  4a5bcace

FAILURE_BUCKET_ID:  X64_0xD1_storport!RaUnitAsyncError+13d

BUCKET_ID:  X64_0xD1_storport!RaUnitAsyncError+13d

Followup: MachineOwner
---------

thanks a lot, that seems to have fixed it!