It was something to do with search indexing in windows 7 so i removed all referenced to my code folder.

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This is a very strange problem,I think it is with my system but i am stumped,Skip to the last entry.I will leave the trail up.
I am getting this error after upgrading to 14.497.
linking:
Access is denied.
*** ERROR - Can't overwrite program. Is it still running?
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*** Finished ***
Elapsed: 2.8 sec. Time: 15:11
Build: 0 succeeded.
*** 1 FAILED ***
I cannot see the file in taskmanager and i cannot delete the .exe from the .app folder if i clean the project it works sometimes but generally i have to kill explorer.