Warning signs: sudden popup ads, a changed browser homepage, unusually high CPU/memory use, or software you don't remember installing. Disconnect from the internet, boot into Safe Mode, and run a full malware scan. Remove any unfamiliar browser extensions. For severe or repeated infections, a clean Windows reinstall (with your data backed up first) is often faster and more reliable than trying to chase down every trace of an infection.

警示信号：突然弹窗广告变多、浏览器主页被改、CPU/内存异常高、出现你不记得装过的软件。先断网，进入安全模式，跑一次全盘恶意软件扫描，删掉不认识的浏览器插件。如果感染严重或反复发作，先备份数据再干净重装系统，往往比追着杀掉每一处感染更快也更可靠。