Windows 7 Pro SP1 64Bit 4 GB Ram Intel Core 2 Quad Q6600 2.4 Ghz
On a new installation of Bitcoin 0.6.3
Initial and subsequent launches of bitcoin-qt.exe result in the following message at the splashscreen:
"A fatal error occured. Bitcoin can no longer continue safely and will quit.
EXCEPTION: N5boost12interprocess22interprocess_exceptionE
Access is denied.
D:\Program FIles (x86)\Bitcoin\bitcoin-qt.exe in Runaway exception"
Clicking Okay closes the window.
I uninstalled/ reinstalled in a new location. Same result.