Cybersecurity Breach Investigation

I need an expert to investigate and eliminate a suspected cyber attack on my Windows system. The attack is causing severe issues, including:

- Slow performance
- Unauthorized access or changes
- Unusual pop-ups or messages
- Battery drainage
- Camera light flickering or staying on
- Constant fake emails and phone calls
- Unauthorized app downloads and photo alterations
- Erratic button presses

I have Trend Micro, Malwarebytes, and NordVPN installed, but the problem persists, possibly through my router or modem.

I need someone who can:
- Identify and remove the threat
- Secure my system
- Provide a detailed report for authorities

Ideal skills and experience:
- Strong background in cybersecurity
- Experience with Windows systems
- Familiarity with VPNs and antivirus software
- Ability to secure routers and modems
- Strong analytical and reporting skills

Please provide a detailed plan and timeline.