Account Temporarily Suspended

Every time I log in to my facebook account, this message appears:

"Your account has been temporarily suspended

Suspicious activity has been detected on your Facebook account and it has been temporarily suspended as a security precaution. It is likely that your account was compromised as a result of entering your password on a website designed to look like Facebook. This type of attack is known as phishing."

When I was asked to answer a security challenge such as, Step 1 Security Check; Step 2 Verify Account ; Step 3 Change Password and Step 4 Restore Account:

The captcha doesn't load at all. I can not begin a single step to the security challenge. I have tried updating my browser and scanned my computer for malwares using Malwarebytes Anti-Malware but both didn't help. What should I do? Please help.

Please tell us what the Antivirus program is you have on there plus the other Protection

Plus what URL you go to to try to access Facebook

I assume this is a private computer and only used by you ?