Fixing The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)

I had some “Weird” things happening with IIS on one of my developer machines. After trouble shooting for a while I decided that was definitely not winning and removed all features from my pc that were even the slightest related to IIS, my pc required a restart so I did. When it came back I re-enabled all the features as I would normally do and then attempted to put my dev site in IIS. For some reason all the sites were stopped and when trying to start them I received the message

Internet Information Services (IIS) Manager
The process cannot access the file because it is being used by another process. (Exception from HRESULT: 0x80070020)

This was very weird as I was at this stage thinking that there shouldn’t be anything running on port 80. I ran a Bing search and kb973094 – Error 0x80070020 when you try to start a Web site in IIS 7.0. Although I am using a later version of IIS I still gave it a read because most times things are similar or the same. In the resolution section it said I should run the below in Command Prompt

netstat -aon | find ":80"

With that I would get the output:


and from there I needed to take the Process ID (Last Column) and look in Task Manager. When I opened Task Manager I noticed that the process that was using port 80 was Skype. After Ending the Skype process and doing an IIS Reset everything was back to normal.

I wanted to find out why Skype would be using port 80 and so I went into the settings and noticed a checkbox that was allowing it to use that port:


After un-checking this box Skype has not taken control again.

Gordon Beeming

Gordon is a Software Developer in Durban, South Africa working for Derivco. He is also a Visual Studio ALM Ranger and ALM MVP. Hew writes about anything that he feels might be useful to anyone in the community.

Related Articles

Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

1 Comment
Newest Most Voted
Inline Feedbacks
View all comments
8 years ago

thank you very much for your help!!!!!!!!!!!!. I was almost lost in this issue and got solution from your post.
thanks much again..

Back to top button