Windows 7 - laptop in sleep mode and can not log back in using ctrl-alt-del

Deployed  Windows 7 Enterprise on 38HP Elite Laptops
Half of the users are mentioning:
Laptop is in sleep-mode, can't log back in with Ctrl-Alt-Del.  Some have to select "new user" in order to login or shut down completely to log back in successfully.

Any ideas?

Before we had the black screen but was resolved with an update from MS.  Now we are getting this sleepmode issue



2.4 GHz Intel® Core™ i5
Mobile Intel® QM57 Express
4 GB RAM
320 GB HDD
1 GB (Nvidia NVS 5100M graphic Card)
WiFi       Yes, 802.11 b/g
Bluetooth v2.1
Battery       8 Cell Lithium – ion Battery
mebibyteAsked:
Who is Participating?
 
jcimarronConnect With a Mentor Commented:
mebibyte-- I have seen several references to problems with Win7 and Sleep mode.  Such as:
http://windows7forums.com/windows-7-support/6565-windows-7-wont-wake-up.html
http://windows7forums.com/windows-7-support/34575-slow-wake-up-standby.html

Set the Power Options option for Sleep to Never and use Hibernate instead to conserve battery life.
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JohnBusiness Consultant (Owner)Commented:
There may well be a special key that brings the laptop out of sleep. On my laptop it is the Fn key. Ctr-Alt-Del does nothing if my laptop is suspended. Sometime pressing the power button once and not for a long time will bring it back from sleep. Do not hold the power button down as that can force shutdown. ... Thinkpads_User
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rindiCommented:
Make sure you have installed all the newest drivers for those PC's, and check their BIOS, there may be an update that addresses that issue.
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JohnBusiness Consultant (Owner)Commented:
Unless you have a non-certified machine, or bum drivers from the vendor, sleep in Windows 7 should work fine. I use daily and have done for a long time now. ... Thinkpads_User
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