Problema este de la placa video ATI. iti recomand sa actualizezi driver-ul si daca nu incearca sa o scoti din calculator si sa o cureti de praf (posibil ca se supraincalzeste si de asta)
Uite cum sa faci descarca pc wizard 2012 si acolo o sa iti arate configuratia completa. Ia-l de aici
http://www.softpedia.com/get/System/System-Info/PC-Wizard-Release.shtml
STEP 1
Reboot the Dell PC, and press and hold down the "F2" key immediately after the computer starts the boot process. The motherboard BIOS setup pages display on the screen.
STEP 2
Note the menu on the page that provides instructions on how to navigate the BIOS setup pages. Press the arrow keys to navigate the cursor to the "SATA Management" option, usually located in the "Advanced Chipset" or "Advanced" setup page. Press the "Enter" key.
STEP 3
Move the cursor to each option configured as "AHCI" using the arrow keys and press the "Enter" key, then arrow down to the "SATA/PATA" option and press the "Enter" key. Alternatively, use the "+" and "-" keys or the "Page Up" and "Page Down" keys if specified by the BIOS navigation menu for setting selection.
STEP 4
Press the "F10" key to save and exit the BIOS setup pages. Press the "Enter" key to confirm the selection.
Http://www.dell.com/......n-15-m5010
Aici e driverul video pentru Windows 7 64biti :)