TechSpot

How to fix a memory leak

By Virtualmemory
Mar 31, 2010
  1. on my original 1st post (please read)

    now i believe the problem is related to a memory leak from a program i installed then uninstalled and it failed to release my memory therefore resulting in lost bytes. sorry if im in the wrong thread, (Please Dont Lock this) i need help
     
  2. Virtualmemory

    Virtualmemory TS Rookie Topic Starter

    okay i have no clue how this website works so sorry guys just really need to get to the bottom of this... the thread where yall said post the HIJACK info at is closed so where do i post the hijackthis log at
     
  3. Virtualmemory

    Virtualmemory TS Rookie Topic Starter

    Logfile of Trend Micro HijackThis v2.0.2
    Scan saved at 3:38:48 PM, on 4/8/2011
    Platform: Windows XP SP3 (WinNT 5.01.2600)
    MSIE: Internet Explorer v8.00 (8.00.6001.18702)
    Boot mode: Normal

    Running processes:
    C:\WINDOWS\System32\smss.exe
    C:\WINDOWS\system32\winlogon.exe
    C:\WINDOWS\system32\services.exe
    C:\WINDOWS\system32\lsass.exe
    C:\WINDOWS\system32\svchost.exe
    C:\WINDOWS\System32\svchost.exe
    C:\WINDOWS\system32\svchost.exe
    C:\WINDOWS\Explorer.EXE
    C:\WINDOWS\system32\svchost.exe
    C:\WINDOWS\system32\wscntfy.exe
    C:\WINDOWS\System32\svchost.exe
    C:\WINDOWS\system32\ctfmon.exe
    C:\WINDOWS\system32\taskmgr.exe
    C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

    R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
    R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
    R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
    R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
    R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = http://home.peoplepc.com/search
    R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
    R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page = C:\WINDOWS\pchealth\helpctr\System\panels\blank.htm
    R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Local Page = C:\WINDOWS\pchealth\helpctr\System\panels\blank.htm
    O2 - BHO: (no name) - {02478D38-C3F9-4efb-9B51-7695ECA05670} - (no file)
    O2 - BHO: AskBar BHO - {201f27d4-3704-41d6-89c1-aa35e39143ed} - (no file)
    O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Documents and Settings\All Users\Application Data\Real\RealPlayer\BrowserRecordPlugin\IE\rpbrowserrecordplugin.dll
    O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre6\bin\ssv.dll
    O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll
    O2 - BHO: JQSIEStartDetectorImpl - {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - C:\Program Files\Java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
    O4 - HKLM\..\Run: [Anti Trojan Elite] C:\Documents and Settings\Queen BEE\My Documents\Downloads\crack\tjender.exe :NO
    O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
    O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre6\bin\npjpi160_19.dll
    O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre6\bin\npjpi160_19.dll
    O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
    O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
    O16 - DPF: {6A060448-60F9-11D5-A6CD-0002B31F7455} (ExentInf Class) -
    O20 - Winlogon Notify: pmnlifeD - pmnlifeD.dll (file missing)

    --
    End of file - 3177 bytes
     
  4. LookinAround

    LookinAround Ex Tech Spotter Posts: 6,491   +183

    Hi Virtualmemory

    Several things
    1) Please understand that everyone here volunteers their time and effort. So depending on who's on the forums at any give time and their background/experience it can be several to many hours (even days) before someone reads the post with info/background who can respond

    2) If you want to be checked for malware see here for Virus/Malware Removal Instructions

    3) As to your memory questions: First, you're misunderstanding terminology.
    > You have 256MB of physical memory (i.e. your RAM)
    > Your "virtual" memory is actually contained on disk space (so windows swaps programs and stuff between your physical and virtual memory
    > You can see here and here for more info on the difference and how to change your virtual memory size

    You can also see here and scroll down to the section about Performance Monitoring the system to understand each task manager term under Perfomance (e.g. Physcial Memory vs Commit Charge)

    Having a smaller commit charge is actually a good thing. But still increase your virtual memory if needed (that will take up more disk space but you have pleenty free space)
     
  5. jobeard

    jobeard TS Ambassador Posts: 9,322   +619

    Memory Leak: the act of GETTING more memory than is being RELEASED.
    This frequently occurs where shunks of memory are necessary for control structures
    or i/o buffers. To make this as simple as possible, let's assume the program GETS two
    areas and returns only one, and does this 100 times. One hundred areas will be kept
    due to the failure to return both areas.

    This occurs ONLY with bad programming, and if that program runs long enough, it will
    cause itself to fail.

    Regardless, once a program quits or fails, the entire address space (ie the memory) is
    returned for availability to other programs - - even if there were memory leaks.

    Uninstalling or reinstalling a program will not impact the Virtual Memory or real memory
    of your system.

    > You have 256MB of physical memory

    is a physical limitation but not one that forces a program to create memory leaks.
     
  6. LookinAround

    LookinAround Ex Tech Spotter Posts: 6,491   +183

    @jobeard: I'm not 100% sure about this, but i don't think shared memory allocations are released when a program terminates thus could cause memory leaks

    @Virtualmemory: the above comment is primarily "geek speak" tech detail. As I also don't think you likely have a memory leak either (but probably do need to increase your virtual memory if you're seeing Virtual memory low messages)
    /* edit */
    @virtualmemory: as i'll add, even assuming worst case you ran a program w/memory leak.. once you uninstalled it any memory leak wouldn't persist across a system reboot
     
  7. jobeard

    jobeard TS Ambassador Posts: 9,322   +619

    the shared DLL references keep count of active users and process termination decrements by one all used by this program.
    Only when use count goes to zero do they get unloaded -- and obviously they're still needed
    which is not a leak :)
     
  8. Virtualmemory

    Virtualmemory TS Rookie Topic Starter

    Thanks for all the input guys. I'm still puzzled on how this all happened. 5 days ago my pc was running fine. i had at least 800,000k on my commit charge but it shrunk to 240,000k <peak. I have tried all the steps on http://www.techspot.com/vb/topic58138.html but these steps dont help, since any program I try to run automatically shuts down. Right now my commit charge stands at 166440k out of 246004k, but like i was saying 5 days ago my commit charge had 800,000k everything was fine until i installed a program called uniture memory booster. I quickly uninstalled it after running it only once, and thats where my problem started. Thanks for all the great feedback and I would appreciate more help if possible. I know you all dedicate your time so thank you all :)
     
  9. Virtualmemory

    Virtualmemory TS Rookie Topic Starter

    @LookinAround Smile because your link you provided just boosted by commit charge up to 508114k now i can try the step by step virus removal steps. You Guys are the best! thank you very, very much.
     
  10. LookinAround

    LookinAround Ex Tech Spotter Posts: 6,491   +183

    Glad to hear you're making progress.. I'd add a couple notes:

    1. In general, i'd strongly advise you stay away from registry cleaners. The more "aggressive" the cleaner the more likely it will only screw up your system. And just not worth it. That said, the only registry cleaner i'll use/trust is CCleaner. On the one hand it only does "basic" cleanup, on other hand i've never had any issue with it on any computer (mine or others)

    2. I'm also very skeptical of any "memory booster" product as being more snake-oil if not even just being excuse to unknowingly install malware. As you likely already know, 256MB memory is really pushing the bare minimum these days. Double check RAM pricing (can be very cheap) as the best way to boost your performance if at all possible

    3. One other performance tweak you might try (if you haven't yet) Rt click My Computer->Properties->Advanced->Performance Settings. Then turn off all those visual affects you don't really need or want
     
  11. Broni

    Broni Malware Annihilator Posts: 52,897   +344

    Your computer is definitely infected and one of the reasons is, you don't have any AV program running.
    Create new topic in malware forum and state your issues.
     
  12. Broni

    Broni Malware Annihilator Posts: 52,897   +344

    Also, as other said, 'memory booster" and any other "magic" tool will do nothing to cure your problem.
    You have to clean up the infection and add more RAM.
    XP with 256MB of RAM will always crawl.
     
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