I found my old wallet key! Now how do I access it?

Back in 2017 I was mining ethereum. I had my tech savvy friend set up the mining process in my computer. After a while I forgot about the whole thing. Now that I’ve started investing into ethereum I remembered that I used to have a e-wallet. I found it on my old hard drive. My question is how do I access this wallet? Is it still possible or is that long gone?