Standby Issue

When I put my computer in standby or it goes into it on its own, when I come
back on, nothing wants to work. The mouse wont move and stuff. If I log off
and back on, cometimes it solves the issue but lately, the screen goes black
and the computer won't log off. I have to crash and restart, etc to get back
in and log on.

Any suggestions or help is greatly appreciated.