Cannot install confluence on Windows server 2008 r2

[HaroldJ]

I have successfully installed JIRA 7.2.1 on my windows server 2008 r2 and connected it to an Oracle 12c database.  It appears to be running just fine.

However, when I try to install Confluence 5.10.4 on the server, I get a "could not create the file. (tomcat8.exe)"  if I try again, it just fails over and over. 

The ID i'm using has admin rights on the server - any idea what's going on?

thnx

[HaroldJ]

it's a brand new server.  I've been able to install JIRA and Jenkins without any issues.     Both have been shutdown while I attempt to install Confluence.    

[Mihai Schwarz]

Can you give me like more details? Do you have anything installed on that machine or it's only Confluence?

[HaroldJ]

The file tomcat8.exe already appears to exist in the folder, but I can't delete it - even though I run the explorer as administrator and attempt to delete.