Hello, I do not know this is good place for this thread if not I please moderator to move it to correct place of the forum I have this laptop: NP300VPA-S04. I have more and more issues with laptop, especially so called responsiveness, lags, freezes ect. Example I open Notepad but wait few seconds after I click File>New. Opening Calculator takes ages when we consider it is just simple app. Web browser freeze from time to time ("no response"). I am tired of this and I try to nail exact cause of this behavior. 1. I have read this thread - Settings/Easy Settings - what you need to know and Reduce latencies on Samsung laptops. 2. I have installed system with minimalistic drivers. No Intel's ProSet, no Samsung's bloatware. Minimal things plus Settings (downloaded externally special version IIRC). 3. I have done this almost half year ago. 4. I have installed Samsung's Recovery Suite. 5. I have Windows 7 x64 full updates. Here some logs from event watcher which I consider interesting - as I use Klingon language for you I must translate so it is not exact error name: Code 11 Atapi Spoiler Driver detected an controler error on \Device\Ide\IdePort0 For four cores, Code 37, Kernel-processor-power Spoiler Processor 0 in group 0 speed is limited by system's software. The processor had limited performance for 83602 seconds since last report. I have also run LatencyMon, here is the result: Spoiler: Stats _________________________________________________________________________________________________________ CONCLUSION _________________________________________________________________________________________________________ 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. At least one detected problem appears to be network related. In case you are using a WLAN adapter, try disabling it to get better results. 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 0:04:48 (h:mm:ss) on all processors. _________________________________________________________________________________________________________ SYSTEM INFORMATION _________________________________________________________________________________________________________ Computer name: FORSBERG-LAPTOP OS version: Windows 7 Service Pack 1, 6.1, build: 7601 (x64) Hardware: 300V3A/300V4A/300V5A/200A4B/200A5B, SAMSUNG ELECTRONICS CO., LTD. CPU: GenuineIntel Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz Logical processors: 4 Processor groups: 1 RAM: 8105 MB total _________________________________________________________________________________________________________ CPU SPEED _________________________________________________________________________________________________________ Reported CPU speed: 2294 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. _________________________________________________________________________________________________________ MEASURED INTERRUPT TO USER PROCESS LATENCIES _________________________________________________________________________________________________________ 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): 25497,377573 Average measured interrupt to process latency (µs): 8,150109 Highest measured interrupt to DPC latency (µs): 1808,077806 Average measured interrupt to DPC latency (µs): 1,281522 _________________________________________________________________________________________________________ REPORTED ISRs _________________________________________________________________________________________________________ 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): 149,476024 Driver with highest ISR routine execution time: ataport.SYS - ATAPI Driver Extension, Microsoft Corporation Highest reported total ISR routine time (%): 0,066408 Driver with highest ISR total time: hal.dll - Hardware Abstraction Layer DLL, Microsoft Corporation Total time spent in ISRs (%) 0,150457 ISR count (execution time <250 µs): 355689 ISR count (execution time 250-500 µs): 0 ISR count (execution time 500-999 µs): 0 ISR count (execution time 1000-1999 µs): 0 ISR count (execution time 2000-3999 µs): 0 ISR count (execution time >=4000 µs): 0 _________________________________________________________________________________________________________ REPORTED DPCs _________________________________________________________________________________________________________ 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): 2947,469050 Driver with highest DPC routine execution time: ndis.sys - Sterownik NDIS 6.20, Microsoft Corporation Highest reported total DPC routine time (%): 0,035087 Driver with highest DPC total execution time: i8042prt.sys - Sterownik portu i8042, Microsoft Corporation Total time spent in DPCs (%) 0,180039 DPC count (execution time <250 µs): 575044 DPC count (execution time 250-500 µs): 0 DPC count (execution time 500-999 µs): 131 DPC count (execution time 1000-1999 µs): 7 DPC count (execution time 2000-3999 µs): 1 DPC count (execution time >=4000 µs): 0 _________________________________________________________________________________________________________ REPORTED HARD PAGEFAULTS _________________________________________________________________________________________________________ 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: svchost.exe Total number of hard pagefaults 105 Hard pagefault count of hardest hit process: 46 Highest hard pagefault resolution time (µs): 32972451,342197 Total time spent in hard pagefaults (%): 5,36670 Number of processes hit: 10 _________________________________________________________________________________________________________ PER CPU DATA _________________________________________________________________________________________________________ CPU 0 Interrupt cycle time (s): 6,151021 CPU 0 ISR highest execution time (µs): 149,476024 CPU 0 ISR total execution time (s): 1,734172 CPU 0 ISR count: 355689 CPU 0 DPC highest execution time (µs): 2947,469050 CPU 0 DPC total execution time (s): 1,939240 CPU 0 DPC count: 552284 _________________________________________________________________________________________________________ CPU 1 Interrupt cycle time (s): 1,390539 CPU 1 ISR highest execution time (µs): 0,0 CPU 1 ISR total execution time (s): 0,0 CPU 1 ISR count: 0 CPU 1 DPC highest execution time (µs): 245,069311 CPU 1 DPC total execution time (s): 0,020001 CPU 1 DPC count: 4524 _________________________________________________________________________________________________________ CPU 2 Interrupt cycle time (s): 1,741382 CPU 2 ISR highest execution time (µs): 0,0 CPU 2 ISR total execution time (s): 0,0 CPU 2 ISR count: 0 CPU 2 DPC highest execution time (µs): 344,082825 CPU 2 DPC total execution time (s): 0,068978 CPU 2 DPC count: 9870 _________________________________________________________________________________________________________ CPU 3 Interrupt cycle time (s): 2,055771 CPU 3 ISR highest execution time (µs): 0,0 CPU 3 ISR total execution time (s): 0,0 CPU 3 ISR count: 0 CPU 3 DPC highest execution time (µs): 396,544464 CPU 3 DPC total execution time (s): 0,046912 CPU 3 DPC count: 8505 _________________________________________________________________________________________________________ What could I do more to get laptop working normal? I would rather avoid remove Settings because there is no other app which can control volume and brightness of screen via keys. After I restart system it is OK till next hibernation & wake up few times, usually 3 days. Today I know I will never buy Samsung laptop again. But it would be waste of money throwing this thing to trash so I beg for some kind solution to make this laptop working normally.