Windows 7 reboots after showing a black screen

It all started when i was doing an Avg Pc Tuneup, this blue screen pops up and it was something about physical memory? couldnt read much cause of the shock and it wasnt there for a very long time as the pc rebooted and that was the last time i saw my desktop. Then i searched google and tried running my pc in safe mode? but that didnt work either also, im not sure if i have a system restore point. Another HUGE problem is that im not very computer literate so i need everything spelled out for me :( i have a "DOS Operating System Install cd and source code" i got it with my dell n5010 would that help fix the problem?
Also that after a lot of reboots and efforts to fix this, now all the screen shows when i boot is "reboot and select proper boot device or insert boot media" i dont know what to do now since google isnt much of a help in this case. I have A lot a lot of important files and pictures of family in that pc that i dont want to loose in any case whatsoever so please kindly help me. My important data is on other drives though and not the one thats not working, if thats any help.
 
Hi,

Here are some tips to fix black screen error on Windows 7 systems with the cursor hang:



Use Windows 7 DVD

You can use the Windows 7 DVD to repair these black screen issues in the system. For this, you need to insert the DVD in the system and then restart the system. You will be then prompted to press any key to boot from the disk. After pressing any key, you will reach the “Install Now” screen. In this screen, you need to select the ‘Repair Your Computer’ options. In the next screen appearing, you will get two options from which you need to select the first option and then select the OS you installed in the system. Choose ‘Start-Up Repair’ from multiple repair options. You will get the system restarting itself and you can get the issue resolved with this.

Last known good configuration

It is possible that any serious changes to the Windows 7 system get it in black screen error with the cursor hang. You can try restoring the system to its last known good configuration to resolve the issue. For this, you need to tap specific keys to enter the set-up of the system. As the BIOS appear, search out the Restore Default Settings options. After selecting the option, save it and then exit the menu. You will then get the system to its initial state. You will get a boot options menu as your computer restarts and you need to select the ‘Last known good configuration’ from this.

Disconnect any external devices

If still you experience the black screen issue in Windows 7 system, you can check if any of system hardware is causing the issue. For this, you need to remove each external device of the system and try to start up the system. You may try disconnecting any unwanted internal devices to fix the issue.
 
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