Waking up from sleep mode

[KianWilliam]

To whom it may concern:
I have win 7 ultimate laptop machine, it is like 10 days, when I put it in sleep mode and I try to wake it up after long hours (e.g 4 or 5 hours), it sometimes shows black screen, sometimes the login display but I can not type my password, sometimes I can type my password but after logging in, I will have a frozen display.
In all those circumstances above , I got to restart or sometimes when I return it back to sleep mode (which takes like 25 minutes!) and awaking it again I will be able to continue working.
any ideas?
Kian William

 

[Megahertz07]

Open Control Panel\All Control Panel Items\Power Options - Change plan settings - Change advanced power settings and check every item.

 

[KianWilliam]

power options

Actually I already did that, items like hibernation and hybrid sleep are all disabled, in regard with ram, I can add to virutal mem via system but instead of doing that I am using Readyboost. I receive a message in regard with color scheme to be changed to add to performance, but when I am using readyboost , ram should be enough to employ any color scheme I want.
Kian William