My computer die after install avast

[jupagose]

Hi.

Just download and install avast on my pc. After restart my pc and before w7 start  it shows a looong looong initial AVAST scan on a black screen.

Trying to stop that scan, I manually shutdn my pc, after that my pc shows hardware disc activity but video don't work.

Please Help

[bobo1]

Looks like black screen of death.
1. Restart machine & tap F8 AS IT IS BOOTING.
2. ON OPTIONS MENU SELECT LAST KNOWN CONFIGURATION OR GO TO SAFE MODE
3. GO TO SYSTEM RESTORE
4. GO TO EARLIER RESTORE POINT
5. REBOOT.
Any previous antivirus before avast was on the computer? if you had then these need to be removed before using avast. With there removal tools ie MACAFEES & SYMANTEC/NORTONS ETC