Hi,
I've run into a "Permission denied" error while checking out the repo. It's most likely a svn bug (on windows) or network problem. However, it's an easy solve. You don't have to redo the whole checkout. Just change into "open" directory or whatever you name it, do an "svn update". SVN is smart and it will pick up where it fails.
If there's an corruption, svn will suggest you to do an "svn cleanup". If that still doesn't work, delete the corrupted folder/files and retry "svn update"
Hopefully you don't have to run into this issue.
Hung-