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CONCLUSION
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Your system appears to be having trouble handling real-time audio and other tasks. You are likely to experience buffer underruns appearing as drop outs, clicks or pops. One or more DPC routines that belong to a driver running in your system appear to be executing for too long. Also one or more ISR routines that belong to a driver running in your system appear to be executing for too long. One problem may be related to power management, disable CPU throttling settings in Control Panel and BIOS setup. Check for BIOS updates.
LatencyMon has been analyzing your system for  0:03:26  (h:mm:ss) on all processors.


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SYSTEM INFORMATION
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Computer name:                                        CHRIS-PC
OS version:                                           Windows 7 , 6.1, build: 7600 (x64)
Hardware:                                             OptiPlex 755                 , Dell Inc., 0PU052
CPU:                                                  GenuineIntel Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz
Logical processors:                                   2
Processor groups:                                     1
RAM:                                                  6013 MB total


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CPU SPEED
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Reported CPU speed:                                   2327 MHz

Note: reported execution times may be calculated based on a fixed reported CPU speed. Disable variable speed settings like Intel Speed Step and AMD Cool N Quiet in the BIOS setup for more accurate results.


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MEASURED INTERRUPT TO USER PROCESS LATENCIES
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The interrupt to process latency reflects the measured interval that a usermode process needed to respond to a hardware request from the moment the interrupt service routine started execution. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.

Highest measured interrupt to process latency (µs):   45052.044723
Average measured interrupt to process latency (µs):   7.084913

Highest measured interrupt to DPC latency (µs):       44883.101205
Average measured interrupt to DPC latency (µs):       3.715619


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 REPORTED ISRs
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Interrupt service routines are routines installed by the OS and device drivers that execute in response to a hardware interrupt signal.

Highest ISR routine execution time (µs):              53481.850021
Driver with highest ISR routine execution time:       dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Highest reported total ISR routine time (%):          2.924312
Driver with highest ISR total time:                   dxgkrnl.sys - DirectX Graphics Kernel, Microsoft Corporation

Total time spent in ISRs (%)                          4.877992

ISR count (execution time <250 µs):                   612002
ISR count (execution time 250-500 µs):                0
ISR count (execution time 500-999 µs):                409
ISR count (execution time 1000-1999 µs):              228
ISR count (execution time 2000-3999 µs):              197
ISR count (execution time >=4000 µs):                 0


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REPORTED DPCs
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DPC routines are part of the interrupt servicing dispatch mechanism and disable the possibility for a process to utilize the CPU while it is interrupted until the DPC has finished execution.

Highest DPC routine execution time (µs):              48591.003868
Driver with highest DPC routine execution time:       nvlddmkm.sys - NVIDIA Windows Kernel Mode Driver, Version 378.66 , NVIDIA Corporation

Highest reported total DPC routine time (%):          0.754510
Driver with highest DPC total execution time:         USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation

Total time spent in DPCs (%)                          1.925247

DPC count (execution time <250 µs):                   892858
DPC count (execution time 250-500 µs):                0
DPC count (execution time 500-999 µs):                222
DPC count (execution time 1000-1999 µs):              126
DPC count (execution time 2000-3999 µs):              48
DPC count (execution time >=4000 µs):                 0


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 REPORTED HARD PAGEFAULTS
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Hard pagefaults are events that get triggered by making use of virtual memory that is not resident in RAM but backed by a memory mapped file on disk. The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution.

NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit.

Process with highest pagefault count:                 explorer.exe

Total number of hard pagefaults                       2160
Hard pagefault count of hardest hit process:          970
Highest hard pagefault resolution time (µs):          601241.113451
Total time spent in hard pagefaults (%):              10.992440
Number of processes hit:                              10


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 PER CPU DATA
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CPU 0 Interrupt cycle time (s):                       14.888643
CPU 0 ISR highest execution time (µs):                53414.373872
CPU 0 ISR total execution time (s):                   10.059091
CPU 0 ISR count:                                      345462
CPU 0 DPC highest execution time (µs):                47830.205844
CPU 0 DPC total execution time (s):                   4.397140
CPU 0 DPC count:                                      623476
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CPU 1 Interrupt cycle time (s):                       13.793221
CPU 1 ISR highest execution time (µs):                53481.850021
CPU 1 ISR total execution time (s):                   10.092967
CPU 1 ISR count:                                      268553
CPU 1 DPC highest execution time (µs):                48591.003868
CPU 1 DPC total execution time (s):                   3.556479
CPU 1 DPC count:                                      270011
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