Symantec – AntiVirus (10) – Causes slow Computer Response\Busy CPU\High Memory uptake by Rtvscan.exe

Symantec – AntiVirus (10) – Causes slow Computer Response\Busy CPU\High Memory uptake by Rtvscan.exe

One of our servers is always slow.  We have rebuilt it a few times over, but it stays slow.

Finally this morning I decided to Google the offending process, the one with the high memory usage.

Lord and behold, Symantec appears to what appears to be a fix:
http://www.symantec.com/business/support/index?page=content&id=TECH103260&key=51852&actp=LIST

To work around this issue: 
Add the following Key and values to Windows 2003 32-bit and 64-bit Servers:

    1. Start regedit.exe and browse to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\Notify
    2. Right-click on the Notify key, and select New > Key.
    3. Type NavLogon for the key.
    4. Right-click on the NavLogon key, and select New > String value.
    5. Type DllName for the String value.
    6. Right-click on the DllName String value, and select Modify.
    7. For the Value data, type C:\WINDOWS\system32\NavLogon.dll (default OS install path)
    8. Click OK and exit the Registry Editor.

After making registry changes, restart the Windows 2003 Server.

2 thoughts on “Symantec – AntiVirus (10) – Causes slow Computer Response\Busy CPU\High Memory uptake by Rtvscan.exe

    • Eric:

      The problem I had was not so much memory intake, but CPU.

      Nevertheless, can you explore the following areas:

      a] Version # – I am running 10.0.0.359 – See if there are any updates for your version

      b] What is the name of the Symantec Executable (exe file) that is the using the most memory

      c] Configuration – File System Auto-Protect \ Drive Types \ Network (suggest you turn it off)

      d] Review configuration \ level of Heuristic scan

      e] Can you reasonable configure to only scan certain file types or exclude some file types as database files or files that are mot executable \ contain executable instructions

      f] Disable Start-up scan

      g] Replace daily with weekly scan (at off hours)

      g] Review configuration \ level of Heuristic scan

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