Windows 8 and 8.1 Forums


[Query]Deny permission on sys file

  1. #1


    Posts : 103
    Windows 8 64 bit

    [Query]Deny permission on sys file


    Dear All,

    I have a system file say ab.sys (90 KB) under C\Windows\System32\Drivers

    every time my PC reboots, the system file gets overwritten with an updated version of bigger size (150 KB). For some reason, I do not want that.

    Please let me know how to prevent that..may be by setting denied permission on the ab.sys file..is there a way?

    Thanks,
    Troy.

      My System SpecsSystem Spec

  2. #2


    Yes, this is possible but I would question whether this was a good solution to your issue. A better way would be to determine why this was taking place, not prevent it with changing permissions. When you start changing permissions on system files you had better know what you are doing.
      My System SpecsSystem Spec

  3. #3


    Posts : 103
    Windows 8 64 bit


    I would be doing that just for this single sys file alone..i hope that it is safe. can you pls tell me how to achieve my goal?
      My System SpecsSystem Spec

  4. #4


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    Try uploading the file to VirusTotal.com and see if it is a form of Virii.

    It SOUNDS like a Virus:

    2/16: NTRootkit-AB a .SYS File That Terminates Antivirus Processes - eSecurity Planet

    Packed:W32/Tibs.AB
      My System SpecsSystem Spec

  5. #5


    Posts : 103
    Windows 8 64 bit


    No, it's not a Virus. Pls see below link from some other site
    Prolific Comm To USB driver not working

    and the below quoted portion from there

    I have to say that the base procedure is ok, very thanks. I must to add, that the file added by drtedrted in this thread is ok. We don't need install on windows7. Just replace ser2pl64.sys. A tip, dennied the permissions of ser2pl64.sys to system, because system will try to update that file everytime you connect again the usb-serial converter.
      My System SpecsSystem Spec

  6. #6


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    That is not the same file though. You may want to change the permissions on the AB.SYS file to match the permissions for the rest of the files in your Driver Library. I could not find any reference to that file on the internet, there are none. I looked deep into 3 different search engines. I'll look some more.
      My System SpecsSystem Spec

  7. #7


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    I've checked four more search engines and not ONE result for "ab.sys" - are you sure this is the exact name of the file? Everything I have seen indicates a Virus NAMED "AB"
      My System SpecsSystem Spec

  8. #8


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    Allright - I have found one, and only one, reference to any file named "AB.SYS" and here it is, and it says nothing. No indication what it belongs to, no other information at all other than it is probably "safe"

    ab.sys Details. Is this file safe? Check the directory
      My System SpecsSystem Spec

  9. #9


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    It may be part of a D-Link Wireless Adapter Driver set, but there are no files of that type in this archive.

    D-Link Systems D-Link AirPlus DWL-G520 Wireless PCI Adapter(rev.B) Free Driver Download File List
      My System SpecsSystem Spec

  10. #10


    Posts : 103
    Windows 8 64 bit


    @XweAponX >> AB.sys was just given as an example bro..in my first post i said "I have a system file say ab.sys"
    the exact name of the file is ser2pl64.sys. please go through the link I provided
    Prolific Comm To USB driver not working
      My System SpecsSystem Spec

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[Query]Deny permission on sys file
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