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We learned today of a particular set of circumstances which, when updating to Update 1, can lead to PSODs (purple screens). 3rd party agents are a key component of this problem.

To avoid this potentially nasty problem please read the following Knowledgebase article for details:

Upgrading ESX 4.0 to 4.0 U1 using Update Manager fails or times out and rebooting host results in a purple diagnostic screen (1016070)

 Note: This KB continues to be updated. Re-visit page for latest information.

Symptoms

When attempting to upgrade ESX 4.0 to ESX 4.0 Update 1, you may experience the following symptoms:

  • Update manager (VUM) upgrade operation fails or times out at 33%.
  • Upon reboot, the host that was being upgraded displays a purple diagnostic screen with the following error:
    COS Panic: Int3 @ mp_register_ioapic