I am Pete, a computer expert, and I'll be happy to assist with your laptop question.
Can you please let me know:
1. What is the make and model number of your laptop?
2. Approximately how old is it?
3. What version of Windows is installed on it?
4. Can you give some examples of the exact security warning messages you are getting?
5. What antivirus software are you using?
6. Has the laptop ever suffered from a virus or malware infection?
7. What is your level of experience in computers? (basic, intermediate, advanced)
8. What date and time does it reset to?
9. Does it reset to the same date and time each time it resets, or does it vary?
10. Any other relevant info?