Computer cannot wake up from sleep mode

If I set "System hibernates after ... mins" and computer goes to hibernating state, or press Sleep button on the keyboard, computer cannot return to normal state after moving the mouse or pressing keyboard key. I need to reset it using Power or Reset buttons.
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Hello AlexFM =)

Are you using any USB2.0 device with the system ?? if Yes then this can be the problem,,, read here :)

You Cannot Resume Your USB 2.0-Enabled Computer from Hibernation;en-us;818339&Product=winxp

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Also check with your computer manufacturer for an updated BIOS since this seems like a power management issue, but you did not mentioned if this is a new problem or if it has happened before.
do you have a usb keyboard and mouse or ps2 type ?
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What is your service pack level?

And if it is SP1 then do you have this installed or not
Is your computer by any chance a Dell laptop? I've seen many of those have this problem, and can be corrected with a BIOS update from Dell.
AlexFMAuthor Commented:
The only USB device connected to computer is USB ADSL modem. I tried to uninstall it, but this doesn't help.

SheharyaarSaahil, I tried to follow your link, this is what I see under USB node in the Device Manager:

Intel(R) 8201EB USB Universal Host Controller - 2D42
Intel(R) 8201EB USB Universal Host Controller - 24D4
Intel(R) 8201EB USB Universal Host Controller - 24D7
Intel(R) 8201EB USB Universal Host Controller - 24DE
Standard Enhanced PCI to USB Host Controller
USB Root Hub
USB Root Hub
USB Root Hub
USB Root Hub
USB Root Hub

I don't know what can I do with this.

OS is Windows XP Professional with SP2. Computer is not Dell laptop.

>> Check with your computer manufacturer for an updated BIOS.

Can I get additional information about this? I have no idea how BIOS may be updated.

BTW, once computer is in Hibernation state, trying to wake it up gives additional problems. For example, after pressing Power button it may load, but screen remains black. Once I got blue screen. I need to turn off computer physically and start "clean" boot, in this case it is OK.

What is the company of your system ?? i mean is it a white box system or from HP or Compaq or what ??
also did this problem started after applying SP2 or was there from very beginning since you got the system ??
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Windows XP

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