0x0000007E (0xC0000005

Please I use a hp 625 notebook laptop. I was trying to install and antivirus and had to start up in safe mode to complete my install as I'll have to edit some things that I won't be able to edit in normal mode. I used msconfig to start it up in safe mode with networking, I was asked to restart the laptop and ever since then it gets stuck at the blue screen that shows 0x0000007E (0xC0000005 codes. It shows it for a very short time and say it can't startup. Have tried to use a windows 7 disc to repair it but I keep getting that error. Each time it reboots it get back to the safe mode with networking screen. Please help me out on this as I don't wanna format the laptop
 
Can you get in safe mode at all. If so go back to msconfig, Set it for a normal start up. See if that works
 
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