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  1. #1
    2 Star Lounger
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    LANGALIST PLUS

    Windows, solid-state disks, and 'trim'



    ByFred Langa

    It's a little-known fact that all solid-state disks — all of them — suffer inevitable performance declines over time.

    It's also little known that Windows 7 and Server 2008 are currently the world's only operating systems to fully implement the new trim command that helps forestall this speed decline.

    The full text of this column is posted at WindowsSecrets.com/2010/01/07/04 (paid content, opens in a new window/tab).

    Columnists typically cannot reply to comments here, but do incorporate the best tips into future columns.
    Last edited by revia; 2011-01-20 at 14:52.

  2. #2
    New Lounger
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    On "Dealing with undeletable Registry keys" the most common issue I have run into with keys that I cannot delete is bad, corrupt or missing permissions on the registry keys. Open Regedit and check permissions on the key(s). There were a few software packages that occasionally splattered during installation or installation and trashed the key permissions. In these cases you had to manually take over each level of registry keys one after the other updating ownership and permissions to allow you to delete them.

    Open Regedit.
    Go to the key in question
    Right click Permissions OR select key then Edit | Permissions
    Click on Advanced
    Go to Owner TAB
    Take ownership (you can do it as yourself or the Administrators group)
    Note1: Checking the "Replace owner on sub containers and objects" may allow you to fix permissions for the entire subtree in one operation.
    Note2: This may now make subkeys visible.
    Repeat on keys and subkeys as necessary.
    Once you have fixed permissions on the entire subtree, you can then delete the subtree.

  3. #3
    Star Lounger
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    I looked up the Devcon KB article (311272) and it says this applies only to:
    # Microsoft Win32 Device Driver Kit for Windows 2000
    # Microsoft Windows XP Driver Development Kit
    # Microsoft Windows Server 2003 Driver Development Kit

    So not much use to a Windows 7 user, it seems?

  4. #4
    New Lounger
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    In the past, when dealing with undeleteable registry keys I have used the following command from a cmd prompt window:

    at [insert time +2 minutes] regedt32 /interactive

    You will need to insert a time in the command (between the brackets in the example above) in order for it to run the command. When that time hits it should run the regedt32 command and work normally from there.

    The at command causes regedt32 to run under the system account and the interactive runs it so that you can get around in the usual regedit window. I have yet to find a key that you cannot delete or modify permissions on with this command (even keys that have no security on them at all). A Microsoft Tech showed me this while working on printer issues on an XP machine that the registry would not let us get rid of the older NT4.0 drivers. He stated that the system account opens the registry like it is a text file and ignores any inherent security on the keys.

    I would caution that this is much more dangerous than using regular regedit in that there is nothing that you can't do with this command. Please make sure to backup your registry before making any changes in this manner.

  5. #5
    New Lounger websquad's Avatar
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    I found the comments on the TRIM command interesting, so with Google's help, I did some research, and would like my conclusions confirmed:

    1. TRIM is automatically "turned on" in Windows 7, but there is a command whereby you can turn it off (for whatever reason).
    2. All SSD's may not be "TRIM" ready.
    3. As best I can tell, you do NOT open up a command window and specify "trim c:" to get drive c: trimmed ... instead, Windows 7 does it automatically whenever you delete a file (not overwrite, but delete), and only then.
    So, this begs the question: how can I determine if my SSD is "TRIM" ready?

    PS: Just ran across this white paper on the TRIM command:

    http://www.maximumpc.com/article/fea...r_trim_command

  6. #6
    Lounge VIP bobprimak's Avatar
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    Regarding Zone Alarm 9 acting up, not functioning, and then leaving behind undeletable Registry Keys:

    (1) Zone Alarm has their own special uninstaller and cleanup tool. Apparently, the reader did use these tools.

    (2) For a more reliable and complete removal of any software, using RevoUninstaller in its Level 4 Mode can automatically remove files, folders and most Registry traces left behind in most uninstaller operations. The new Revo Pro version ($40.00) can also cleanup many failed uninstalls and failed installs, as well as clean up Registry traces most Registry cleaners would have trouble with. I cannot guarantee success with either of Revo's uninstaller programs, but I have successfully completely removed Zone Alarm Free with the free version. I generally use RevoUninstaller on any program I want to completely remove. Then I run CCleaner's Registry and System cleaners to make sure everything is gone. Very important when trying for a clean install or a clean reinstall.
    -- Bob Primak --

  7. #7
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    I don't know if I should quote previous Windows Secrets paid content here or not, so I won't. I also don't know whether this is applicable to the specific situation described, but regarding undeletable registry keys, how about the tip in the 2009-01-22 Windows Secrets about using psexec to edit the registry remotely?

  8. #8
    New Lounger
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    Quote Originally Posted by Bob Coleman View Post
    I don't know if I should quote previous Windows Secrets paid content here or not, so I won't. I also don't know whether this is applicable to the specific situation described, but regarding undeletable registry keys, how about the tip in the 2009-01-22 Windows Secrets about using psexec to edit the registry remotely?
    It's fine to refer to past WS articles in Lounge posts, whether they appeared in the paid section or the free section. Here's a link to the item in Fred's Jan. 22, 2009, column on SysInternals' PsExec utility (scroll to the last item, "Powerful free tool simplifies Registry edits"):

    http://WindowsSecrets.com/2009/01/22/04

  9. #9
    Brian Livingston
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    I'd like to reiterate that it's fine to link in Lounge posts to Web pages that contain paid newsletter columns. Our paid subscribers can simply enter their address and reader number (or click OK when their browser enters these details for them) to display the full article. Free subscribers can see a short summary of the article or make a financial contribution of any amount to get a 12-month paid subscription, which of course enables them to read all past paid content.

  10. #10
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    Devcon Powerful, free alternative to Device Manager

    I have had my Wireless connection go walkabout, occasionally on booting the system, the wireless icon just fails to appear in the systray and I have no connection to my router, network or internet. If I go into device manager there is no sign of a wireless network device. Rebooting, toggling the WiFi switch on the front of the laptop, safemode, nothing I tried would fix the problem so in desperation thinking my wireless device was broken I plugged in a LAN cable. On bootup the wireless device is back and working fine again. This has now become my fix for this problem as it works every time and I haven't bothered to diagnose the loss of wireless any further. However, next time it happens I will try DEVCON and report back if I find anything.

  11. #11
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    Quote Originally Posted by David Hutton-Squire View Post
    So not much use to a Windows 7 user, it seems?
    Has anyone tried it yet? I often find Microsoft information on valid systems is out of date because they do not update all the old web pages when new software versions come out.

  12. #12
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    [quote name='Fred Langa' date='2010-01-07]
    It's a little-known fact that all solid-state disks all of them
    suffer inevitable performance declines over time.

    [/quote]

    Does this apply to USB drives also? If so is TRIM relevant to them as well?

  13. #13
    New Lounger
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    Quote Originally Posted by JG Weston View Post
    Has anyone tried it yet? I often find Microsoft information on valid systems is out of date because they do not update all the old web pages when new software versions come out.

  14. #14
    New Lounger
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    Yes, I've tried it in Vista. It open another command-line window with the results, then disappears after a few seconds. It then pops up a window that says the program may not have installed correctly.
    Tried issuing from the command line, from within a command-prompt window . . . I even tried piping the output to a text file. All it did was create an empty text file.
    I would expect the same results with Win7.
    I suppose you cannot expect software written in 2003 and never updated, to work in new 2010 OS's.

  15. #15
    Super Moderator satrow's Avatar
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    Devcon seems to work as expected fror me running from an elevated Command prompt using Windows 7 32-bit Build 7100.

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