Article ID: 3588, created on Feb 3, 2008, last review on Apr 13, 2015

  • Applies to:
  • Virtuozzo containers for Windows 4.0


Virtuozzo management service or Virtuzzo KSAL service does not start.


Most likely the reason of the problem is incompatible Microsoft update(s) installed on the node.


Since Parallels Virtuozzo Containers 4.0, the utility ksaltester has been implemented. It displays information about the incompatible update(s) and the usage is the following:

ksaltester -db ksalDB.dat

WARNING: Image C:\WINDOWS\system32\drivers\spud.sys is absent in OS


File C:\WINDOWS\system32\ntoskrnl.exe


Original name ntkrnlmp


Language 1033 codepage 1200 version 5.2.3790.4035 (srv03_sp2_gdr.070304-2240)


Update KB931784 is not compatible with Virtuozzo


Also you can check a specific file:

ksaltester -file c:\windows\system32\kernel32.dll


File c:\windows\system32\kernel32.dll


Language 1033 codepage 1200 version 5.2.3790.4062 (srv03_sp2_gdr.070417-0203)


File was included to update KB935839


For other versions

Check this KB article #11132 for the instructions how to check KSAL in PVC 4.5/4.6.

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