2, it may be a malicious plug-in or a malicious program. Install 360 security guards, find them in the "clean plug-in" and clean them up.

3. If you install the required software yourself, you can install 360 security guards, find "startup acceleration" in its "function collection", and prohibit startup in the "startup item".

PS: Just found peanut shell: peanut shell dynamic domain name is a completely free dynamic domain name resolution software, with the largest number of users in the world. It seems that the method of 1 or 3 can be used.