One of the solutions for Internet access failure in IE

The company has dozens of computers connected to local networks. One day someone told his computer that he could not access the internet. As a network administrator, I quickly arrived:
1. Ping other computers in the network first;
2. Use QQ to log on and find that it can be launched. OK;
3. Enable IE to find the address, but eventually the display time-out cannot be reached, dizzy;
4. re-install the TCP/IP protocol, restart (Win98), or fail. Urgent;
What should I do? Only live horses are used as dead horses. Suddenly, I thought of SFC in 98. Program, Run, and find that many system files are lost. After adding the file, run ie again, which is normal. It's really easy. Close-up for emergency purposes.