I installed the latest version of Bitcoin on a new computer, everything started up normally and it started synchronizing. I closed the program (waited for it to finish) and reopened. When I did that it now says "Cannot obtain a lock on data directory C:\Program Files\Bitcoin. Bitcoin Core is probably already running. Access is denied".

I've googled the issue, tried deleting the LOCK file, tried uninstalling/reinstalling, and can't get it to work.

There is one thing I changed during the initial installation. When it asked me where I wanted the blockchain data, I changed it to the Program Files\Bitcoin directory instead of the default user App Data directory. I'm not sure if this is bad or messed something up.

After I uninstalled and reinstalled, it no longer asks me where I want the blockchain data so I don't know how to change that.