Run command prompt as administrator then do the following:
Enter command: ipconfig /flushdns
Enter command: netsh winsock reset
Restart the computer.
This should fix it. There are a number of updates that seem to cause this problem for many people. For some reason there has not been a fix sent out. You will either be using the net and then it just won't load a web page, or you won't be able to open a page from the start. For some reason streaming services will not be interrupted most of the time. Also you can ping and IP so it is NOT the modem, it's the PC. Do not know if it's happening on Phones or Tablets but many PC's have had the problem. In one case I read about, 3 out of 5 computers in an office where effected.
Peace - Dave.