上网的时候，特别是上购物网站的时候，总是会自动弹出一个叫聚惠算（juhuisuan.com）的购物网站。这是因为当地的宽带运营商跟聚惠算这类企业合作，进行 dns 劫持、篡改、污染等原因造成的，这并不是因为你自己的电脑中毒了（当然也可能是中毒了）。
解决办法：
1、打运营商电话，如 10000、10086 等，投诉，若不行可再打上一级电话投诉；
2、修改第三方 DNS。
常用公共 DNS#
| 名称 | DNS1 | DNS2 |
|---|---|---|
| 114DNS | 114.114.114.114 | 114.114.115.115 |
| 腾讯云 | 119.29.29.29 | 182.254.116.116 |
| 阿里云 | 223.5.5.5 | 223.6.6.6 |
| CNNIC | 1.2.4.8 | 210.2.4.8 |
| 百度云 | 180.76.76.76 | |
| 360 DNS 派 | 101.226.4.6 | 218.30.118.6 |
| 清华大学 | 101.6.6.6 | 2001:da8::666 |
| OneDNS | 117.50.11.11 | 117.50.22.22 |
| 8.8.8.8 | 8.8.4.4 | |
| OpenDNS | 208.67.222.222 | 208.67.220.220 |
| Cloudflare | 1.1.1.1 | 1.0.0.1 |
| Quad9 | 9.9.9.9 | 149.112.112.112 |
| Norton | 199.85.126.10 | 199.85.127.10 |
| Yandex | 77.88.8.8 | 77.88.8.1 |
| Freenom | 80.80.80.80 | 80.80.81.81 |
| COMODO | 8.26.56.26 | 8.20.247.20 |
| Level3 | 209.244.0.3 | 209.244.0.4 |
| DNS.Watch | 84.200.69.80 | 84.200.70.40 |
| Verisign | 64.6.64.6 | 64.6.65.6 |
| SafeDNS | 195.46.39.39 | 195.46.39.40 |
| OpenNIC | 185.121.177.177 | 169.239.202.202 |
| SmartViper | 208.76.50.50 | 208.76.51.51 |
| Freenom | 80.80.80.80 | 80.80.81.81 |
| Dyn | 216.146.35.35 | 216.146.36.36 |
| FreeDNS | 37.235.1.174 | 37.235.1.177 |
| Alternate DNS | 198.101.242.72 | 23.253.163.53 |
| UncensoredDNS | 91.239.100.100 | 89.233.43.71 |
| Neustar | 156.154.70.1 | 156.154.71.1 |
AdGuard Known DNS Providers:
https://kb.adguard.com/zh/general/dns-providers
全球所有 DNS：
https://public-dns.info/nameservers-all.txt