I run Windows 7 64 bits and I have an issue about 50% of the time when coming out of sleep mode: my monitors remain won't lit, non of the USB peripherals will start (hubs, usb drives, etc.) and I need to force shutdown then reboot.

Hi first update your BIOS Microsoft has released the HOT FIX download and test the issue follow this Click Start Orb > type cmd in the search box > right-click cmd in results above > click Run as administrator - At the prompt type powercfg -devicequery ( wake up from any key) > press enter, it tells you what devices may cause problems with sleep mode Also, update all the device drivers including chipset driver, mouse driver and display card driver. Please run Windows Update and keep the system update to date. Besides, if there is any security (anti-virus, anti-spyware) software installed, temporary disable or turn them off to check the result. if the issue persists you can also perform Clean Boot test How to perform Clean Boot: 1. Click Start, type MSCONFIG in the Search Bar and Press Enter to start the System Configuration Utility. Please click Continue if the "User Account Control" window pops up. 2. Click the Services tab, check the "Hide All Microsoft Services" box and click Disable All (if it is not gray). 3. Click the Startup tab, click Disable All and click OK. 4. Restart the computer and test the issue. ==> Clean Boot is a troubleshooting step. If some programs have been disabled during the troubleshooting, we can enable them later. If there appears System Configuration Utility , check the box of "Don't show this message" and then click OK. You can also try the following steps: Change Power plan ============= 1. Click the Start Button, type "power options" (without quotation marks) in the Start Search box and press Enter. 2. Choose High Performance (Expand the arrow at the right side) and click Change plan settings under High Performance. 3. Click Restore default settings for this plan and click Yea click Save changes. Please let the computer to sleep mode manually and check if we can resume correctly. Hope it helps Nikhil

Nikhil,Thank you for your answer, but it didn't help.Windows 7 is still failing to come out of sleep mode about 50% of the time. That's extremely disappointing.Nicolas

Hi What's the result of powercfg -devicequery ( wake up from any key). Have you tried clean boot. Give us more information about your motherboard and search for updated drivers and install it. Nikhil