1. Microsoft Security Essentials:
Scan your PC or Laptop regularly with ‘Microsoft Security Essentials’, free virus protection from Microsoft:
Download from below link:
Another recommended Security Software Malware Bytes
2. Windows Update:
Install updates from Microsoft regularly.
Go to Control Panel\System and Security\Windows Update or Start > search ‘Windows Update’ and open.
If you want to Check updates available click on ‘Check for updates’
Click on ‘Change Settings’ for Important updates choose ‘Install updates automatically (recommended)’ > Ok.
3. Encrypt contents:
Encrypt your Folders and Files with Password.