Computer not sleeping in sleep mode.

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One possibility is if you have an optical/laser mouse that is on a relective surface and the mouse light is reflecting and triggering the computer to think that there is activity.
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\015\012More than likely, your network card is keeping your computer from staying in sleep mode as any internet data activity is taking the computer out of sleep mode making the computer think there is activity.
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\015\012There is an option in the Network Adapter properties that says to "Allow this device to wake up your computer"
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\015\012Go to Control Panel and click Classic View on the left hand side
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\015\012Double Click the Network and Sharing Centre Icon.
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\015\012On the left hand side of the window that opens, click Manage Network Connections.
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\015\012Right Click on the connected Network Connection. It is probably the Local Area Connection. Right click on it and choose Properties
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\015\012A new box will open up. Click the Configure button under the Connect Using: box
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\015\012Click the last tab at the top that says Power Management.
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\015\012Under the Power Management tab click the square box that is beside: Allow this Device to Wake the Computer to take the checkmark out of the box. Then Click OK at the botton and close all the windows.
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\015\012Let the computer go into Sleep mode and see if the computer still comes out of sleep mode on its own.
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\015\012Let me know if this worked for you,
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\015\012Ry
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