I recently upgraded from Windows Xp to Windows 7, and whenever I try to log off or change users, the screen will go black and i cant do anything. I can move the mouse around, but that's it. I end up having to shut down and re-boot. I dont know much about computers, so if someone could explain it to me in simple terms that would be great
I would first go check for updated video drivers. Find out the manufacturer and model of your card if you don't already know and go to their site to get the latest drivers. Once the newest drivers are installed, see if the black screen issue still occurs.
Ok. Now lets try disabling some drivers. If the system will boot into Safe Mode (hit F8 during the boot up process and choose Safe Mode from the list that appears), open up the Device Manager and disable the Sound and network drivers. If this doesn't work, uninstall the video driver (make sure you tick the box to delete the driver from the computer when you do this) so the system defaults back to the generic video driver.
F2 and F12 are likely your BIOS and device boot menu. These won't let you access safe mode. F8 is the only way to get into safe mode without actually booting into Windows in normal mode first. Continue pressing F8 as soon as your computer actually reboots and loads the POST screen.
Dare I ask where you got this from? Even if you downloaded it (still hesitant to ask where it came from) from the internet, you should have had to burn a disk to install the OS since you came from Windows XP. Microsoft doesn't allow in-place upgrades from Windows XP, so you would have had to burn a disk and booted from it.