@sophivan:
Update Your system, at least to Windows 8.1, Windows 7 got Microsoft End of Support since last 19 of January.
You may set
UAC to Always Notify.
Consider to use an extra tool to harden Your protection, for example
NoVirusThanks SysHardener tool (Defaults tweaks).
In
Virus and Malware Removal Tools, You may add EmsiSoft Emergengy Kit and HitManPro Free.
In
Privacy-focused Apps and Extensions , You may add uBlock Origin or AdGuard AdBlocker extension to Your browsers.
A
PassWord Manager would be welcome also.
Please kindly reflect Your changes editing Your config, and announcing them here, thanks for sharing