I am having this issue today, 2017/08/26.
Renaming the files (adding .bad to the end) seems to have solved this issue for me.
I would like to mark this (some conflicts were found in the installtion area) a duplicate of the issue noted below, which seems to have the superior solution, although it has ZERO votes, and I am not yet able to upvote anything. Or mark dupes...
Hope this helps.
The following text has been "Stolen" from: Android Studio Update: Some conflicts found in installation area
This seems to be the best answer:
"""
I know this is an older question but I encountered the same error while updating SDK components in Android Studio 2.3.3. I was able to fix the problem by starting the SDK manager and un-checking the components that showed the error and clicked "Apply". That un-installed just that component. When it was finished, I re-checked the component and clicked "Apply" again. When it was finished, the problematic component was updated to the newest version. This was much quicker than doing a full un-install/re-install as stated in one of the solutions above.
"""