How did Lenovo tablet computer idea tab 1000t get infected with virus?

According to the description, it is recommended to refer to:

1, download and install anti-virus security software, which can effectively remove viruses;

2. If using security software to kill viruses is ineffective, please back up the data and try to restore the factory settings. Before resuming operation, back up some important files, such as SMS, contacts, photos, software, etc. To avoid unnecessary losses;

3. If the virus cannot be completely removed after the factory settings are restored, it is recommended to go to Lenovo's maintenance site in time.