Tablet Security Breach and Control Issues

My tablet has been compromised. There are unauthorized applications appearing on it from unknown sources. Despite my attempts to remove them, the issue persists. I need a professional to assess the situation, secure the device, and restore its functionality.

Skills & Experience Required:
- Proficient in cybersecurity
- Experience with tablet troubleshooting and repair
- Knowledge in removing unauthorized software
- Ability to restore device functionality
- Excellent problem-solving skills

Please, only bid if you have proven experience in dealing with similar issues. Thank you.