Update your Security Antivirus, Backup your data on regular basis, Scan your device with anti malware and anti phishing software, Update your windows regularly, Delete unnecessary files and folders.

2.  Update your Security Antivirus

3.  Backup your Data on regular basis

4.  Scan your device with Anti malware and Anti
Phishing Software

5.  Update your Windows regularly

6.  Delete unnecessary Folders and Files

7.  Run a Disk Defragmenter or a Disk Cleaner