When I recently logged on to QQ, I always found a prompt in the lower-right corner of the screen, suspected that my QQ account was stolen. I was in Beijing, but someone logged on to Hangzhou, Zhejiang Province in October 26 using my QQ account. Prompt me to scan and kill the Trojan horse and change the password. So I clicked the "Trojan Detection" button in the lower-left corner of the logon window. After scanning, I found that there was a problem. The prompt shown below in the QQ User Logon window was as follows, "you have discovered a vulnerability that may be exploited by Trojan horses. Please use QQ doctor to fix it ".
Then, I click "Start QQ doctor" in the lower-right corner of the logon window to enter the window shown in:
Click the full scan button in the lower-right corner to enter the window shown in:
After scanning, no Trojan Horse is detected, but the system has a vulnerability. Finally, three patches are downloaded. Complete the repair.