I just wanted to offer some generic advice in this thread in case it helps.
Anyone who is experiencing this issue:
Have you tried temporarily disabling anti-virus software?
Another option may be to add a specific exception in the settings for your anti-virus software for eagle.exe.
Instructions would looks something roughly like
1. Type “VirusScan Console” at the Start screen and press “Enter.”
2. Right-click “On-Access Scanner” listed in the left window pane and select “Properties.”
3. Click “All Processes, Detection, Exclusions” and select the “Exclusions” tab.
4. Click the “Add” button, click “Browse” and select the folder or file you want to add as an exception. (%program files%\autodesk\autodesk Eagle X.X\Eagle.exe - this is a bit of a guess sorry if it is not exact)
5. Click “OK” in the “Add Exclusions Item” dialog box and click “OK” in the “Set Exclusions” prompt.
6. Click “Apply” in the “On-Demand Scan Properties” window and click “OK” to save your settings.
If you are running on Windows another tip may be to right click on the launch icon for Eagle and select Run As Administrator.
I hope this helps!
Nathan Chandler
Principal Specialist