Executable (distribution) can't be deleted in Window XP

[Graham Samuel]

I've been building apps (distributions) using my nice new laptop 
running Windows XP. No problem there - but when I want to rebuild, 
the DB doesn't seem to be able to delete (overwrite) the previous 
version of the app (which always has the same name). After running 
the app, I want to delete it: when I try to delete the .exe file 
directly by selecting it in Windows Explorer and choosing 'delete' 
from the right-click menu, I get a message saying that it can't be 
deleted because 'Access is denied'. The app isn't running and doesn't 
show up in the taskbar. I know next to nothing about Windows XP, but 
it seems to me that RunRev has done something to the file to make it 
impossible to delete.

Can anyone explain this? Nothing in bugzilla that I could find.

TIA

Graham
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          Graham Samuel / The Living Fossil Co. / UK & France