Well, I have a new laptop that was working fine but after installing windowblinds and cursorfx I noticed a problem.
If it was idle, turned on/top shut, for a period of time, when I open it it would show the locked screen then go to the desktop, sometimes showing TWO pointers, then nothing. It would not respond and I would have to force it to shut down.
I have now put the default cursors back and tested it, seems to work fine.
The cursor set I was using in cursorfx was called Hand.