my vista screen turns black with only mouse

i was transhering a file to my psp and then my computer froze so i waited about 5 mins and still nothing i hit alt+ctrl+delete and i click log out... then i went to log back in it brong me to a black screen only with a mouse nothing else so i waited an other 5 mins nothing so i hit the power boutten and still it says welcome then it goes to a black screen but please some one help me ( i was thinking that it was my video card (redean 9800pro) so i took that out and put in a redean 9700pro but it didnt do anything just like it was be for ) so some one plesa help me.....

Welcome to the Vista BSOP (Black Screen of Procrastination)
I don't have anything to share except your pain. I am in a very similar situation. Will be monitoring this thread for any progress you make.

The only time I have experienced a BSOP (LOL) was when I recently tried to transfer photos to a 7' Digital Frame through USB.

I just can't get Vista or XP to recognise the SD Card as a drive. So I think the Frame is faulty and it cause.

The same SD card works perfectly when I place it in my camcorder and transfer files ot it through USB\

So, in short, your psp has a problem