cmonie,
Sorry that you are seeing this issue.
1. Can you please share the Installation Details from MyEclipse > Installation Summary > Installation Details ?
2. Is your workspace in a local directory or on a mounted filesystem? Can you please make sure you have full rights to that folder? Try running MyEclipse as ‘Administrator’ to see if it fixes the issue.
3. Can you please check if any of these steps help fix the issue ?
a. Go to the Task Manager and kill the javaw.exe process and see if it fixes the issue.
b. Relocate .metadata/ folder, open and close MyEclipse, then overwrite .metadata folder back.
4. If the issue persists, can you please check if you see the same issue for a new workspace? If you see the same issue, please copy paste the contents of the .log file which is located at <workspace dir>/.metadata/.log to help us investigate further.
Let us know how it works for you.