Windows 8.1 changed msconfig to boot to safe mode - now it won't boot at all

[winds10]

I was trying to get my computer to boot to safe mode so I could delete all AVG virus scan related files. I followed instructions online where they said to change the msconfig.exe setting in the boot tab to boot in safe mode.

After making the change and restarted, but the computer won't boot to any screen at all. The F8 during the boot is unresponsive. I cannot even get it to boot to my Windows 8.1 DVD.

How can I revert the msconfig change I made so I can boot successfully? Please help! Thanks.

 

[Colif]

is this a laptop or desktop? If desktop, is it custom made or Brand name?

If laptop or brand name, what make/model?
If custom, what motherboard?

You might need to change the boot order in bios to boot off the DVD, if you tell me what you have I can go see what I can find.