Thanks Franks, After making several tests (using a small C# program I wrote to count the number of cores using this API), I'm able to report that this is indeed a bug with Windows Server 2003 and Windows XP Pro x64 SP2, and I'm glad to report that installing KB932370 resolves this problem. This bug is not present in Windows XP Pro SP3 (32 bit).
This means no workaround is necessary. p.s. This note is better mentioned somewhere. Best regards, Tal ----- Original Message ----- From: "Frank Mehnert" <[email protected]> To: <[email protected]> Sent: Monday, December 30, 2013 7:06 PM Subject: Re: [vbox-dev] Can't use more than one vCPU afterupgradingtoVirtualBox 4.3.x > _______________________________________________ > vbox-dev mailing list > [email protected] > https://www.virtualbox.org/mailman/listinfo/vbox-dev >
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