orange icon (no replies)

I have an orange icon.I have just installed Wamp so that I can install Word Press and play with it. I have the following two messages showing

Too more lines in hosts
Error c:/wamp64 or PHP in PATH.

I am using Windows 10 -64 bit. Wamp 3.1.7 (64 bit), apache 2.4.37, PHP 7.2.4, SQL 5.7.24 (These all mean nothing to me!

I am a total novice at this so if any one can help please could you give me step by step instructions in easy to understand language. Thank you. Diane