Steps to check Hosts file :
Windows:
1)Navigate to C:\Windows\System32\drivers\etc and look for file named hosts inside etc folder.
2)Copy the hosts file to Desktop and open the same with notepad.
Check whether you can see any Adobe related entries inside Hosts file like 127.0.0.1 activate.adobe.com.......etc??
Mac :
1) Right click on the Finder icon on dock and select "Go-To Folder" option.
2) You will get a text box, type-in below mentioned command and then hit 'Return' key.
/etc
3) It will open the etc folder, please look for file named "hosts" and copy the same to Desktop screen.
4)Double click on Hosts file , it will open it with TextEdit,
Check whether you can see any Adobe related entries inside Hosts file like 127.0.0.1 activate.adobe.com.......etc??
No Adobe entries in Hosts file?? Let us know ,