Here are some steps for checking and removing malware:

1. Check for Malicious Activity: Look for suspicious activities on your computer, such as popup windows, changes to your browser settings, etc.
2. Install Anti-Malware Software: Install an anti-malware software program on your computer to help remove the threat.
3. Scan Your Computer: Scan your computer for any malware-infected files that may exist on your hard drive.
4. Remove any Malware Found: If any malware is found, use the anti-malware software to remove any threats.