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When you press a key on your Universal Serial Bus (USB) keyboard, use a USB mouse, or use the computer's power button to resume your computer from standby (an S3 state), the first keystroke may be lost. Although subsequent key strokes wake the computer, these key strokes are passed along to the program that currently has focus.
When the computer wakes up from Standby mode by using a USB keyboard, the host controller driver may not preserve the data toggle bit. This may prevent the host controller from receiving correct data when the computer resumes from an S3 state.
To resolve this problem, obtain the latest service pack for Windows XP. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
322389 How to Obtain the Latest Windows XP Service Pack
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: