It's not like I haven't updated it for 20 days. The update speed of the other computer is very slow. Just wait. It may be caused by your poor network. Personally, I think there may be a virus in your computer. . . This factor is very large. 2. It may be that you didn't click the Apply and OK button after the modification, but according to LZ, I feel that this problem should not happen, but there are also factors in this regard. 3. Maybe there is something wrong with your QQ version. LZ is recommended to download the latest QQ. 4. It may be the network, which is also a big factor. Because after you modify the signature, the signature information will be transmitted to the server through the network. If the network gets stuck or the network loses packets, the modification will also fail. Because the signature information exists on the server side, and your QQ chat information generally exists locally. The above is just my personal opinion. Suggest that the landlord try a method. You apply for a new QQ number (if you have one, you don't need to apply) and add your current number. After modifying your QQ number signature and confirming your application, click your QQ file with your newly applied QQ number, and click the refresh button below in the pop-up file interface. After refreshing the interface, you can see whether your signature is the one you modified. If not, your computer must have a virus, because you said it disappeared after restarting, so I suggest the landlord find a better antivirus software and kill it all. I don't know if I made it clear, hehe, I hope it will help LZ. According to what you said, I think it's a virus ... but LZ said it has been killed and there is no virus, so I don't know, because some viruses will maliciously tamper with information. Suggest that the landlord go to Rising next time. Now the genuine Rising is free for half a year. Please try it. Anyway, it's not very big, and the download is fast, but it takes a long time to completely kill, about 1 hour. Also, you can try to enter the safe mode of network connection, modify the signature, and then see if there will be tampering.