When you run Virtual PC 2004 on a portable computer that uses the Intel Centrino 915 chipset, Virtual PC performance is reduced
SYMPTOMS
When you run Microsoft Virtual PC 2004 on a
portable computer that uses the Intel
Centrino 915 chipset, Virtual PC performance
is reduced when compared to its performance
on portable computers that use older
Centrino chipsets.
CAUSE
The Centrino 915 chipset has a new power
saving architecture that disables the Time
Stamp Counter (TSC) when the chipset uses
the Intel SpeedStep technology. This
behavior causes Virtual PC 2004 to make
incorrect calculations.
RESOLUTION
A supported hotfix is now available from
Microsoft, but it is only intended to
correct the problem that is described in
this article. Only apply it to systems that
are experiencing this specific problem. This
hotfix may receive additional testing.
Therefore, if you are not severely affected
by this problem, we recommend that you wait
for the next Virtual PC 2004 service pack
that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
(http://support.microsoft.com/contactus/?ws=support)
Note In special cases, charges that
are ordinarily incurred for support calls
may be canceled if a Microsoft Support
Professional determines that a specific
update will resolve your problem. The usual
support costs will apply to additional
support questions and issues that do not
qualify for the specific update in question.The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Size File name -------------------------------------------------------------- 19-Jun-2005 23:26 2,195,968 Vpc2004qfe899525_msdn.msp 19-Jun-2005 23:26 3,460,608 Vpc2004qfe899525_update.msp