After shutting down Vista and restart, the work unit in progress errors out. The reason is, that the Operating System (OS) is not allowing enough time for the BOINC client or WCG(UD) agent to close the program properly and store the progress files on disk. A solution is found in the BOINC FAQ: exit code -1073741510 (0xc000013a) partly transcribed below **. Creating or increasing a shutdown delay value in the System Registry of up to 60 seconds will resolve the problem. Though exiting the client followed by the shutting down of the OS is an alternate way, it is important to leave enough time before proceeding to close/restart Vista.

** Copy / Paste the following bold-italic text into Notepad or other flat ASCII text editor and save with the *exact* name "WaitToKill.reg" to your desktop. Make sure the file extension is ".reg" (rename if need be).

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control]
"WaitToKillServiceTimeout"="60000"

To add this fix to the System Registry, double-click the file you saved to the desktop. Respond to all UAC and subsequent messages *Yes* and *OK*. Exit BOINC if not done already, allow a little time and restart Vista thru the proper Start menu option for the change to take effect.

If at boot time one observes a new download of several hundred thousand bytes or more in the main screen of the WCG(UD) agent, the cause is most likely equal and the same fix would apply as for BOINC.