This is all my stderr log has:

Another instance of BOINC is running.
GLE: Another instance of BOINC is running.
GLE: Another instanc
Another instance of BOINC is running.
GLE: Another instance of BOINC is running.
GLE: Another instanc

stdou shows this, close as I can find to what looks like an error of some kind:

Milkyway@home] Application uses missing NVIDIA GPU
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_fix10_2_972656_1306603817_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_free_2_988335_1306606718_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_fix10_2_996742_1306608426_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_fix10_2_999750_1306609021_1
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_10_3s_fix20_2_1013524_1306611655_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_fix10_2_1013271_1306611655_1
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_fix20_2_1028094_1306614608_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task ps_test_4_234939_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_10_3s_fix10_2_1041085_1306617280_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_free_2_19404_1305927073_1
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_10_3s_fix10_2_1054720_1306620041_0
28-May-2011 16:50:53 [Milkyway@home] Missing coprocessor for task de_separation_13_3s_fix10_2_1061303_1306621268_0
28-May-2011 16:50:54 [Milkyway@home] URL http://milkyway.cs.rpi.edu/milkyway/; Computer ID 289220; resource share 100
28-May-2011 16:50:54 [World Community Grid] URL http://www.worldcommunitygrid.org/; Computer ID 1600368; resource share 100
28-May-2011 16:50:54 [Milkyway@home] General prefs: from Milkyway@home (last modified 09-Apr-2011 03:45:51)
28-May-2011 16:50:54 [Milkyway@home] Host location: none

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32bit Windows XP Home
AMD Opteron 180
ASUS A8N-SLI Motherboard
Nvidia 450GTS GPU
4GB DDR Memory

Chris

Looking at that log .... BOINC is claiming that it cant see any NVidia card, and thats why the subsequent runs of WUs fail.

Its also claiming you have more than one instance of BOINC running.

First to resolve is number of BOINC instances running. Do you have two "copies" running? If you are not sure, go to task manager, click on the Image column to sort it, and look for "boinc.exe" - you should only find one listed. (just boinc.exe, there will be others spelt slightly differently). If there are two or more, reboot, take another look - before doing anything with apps/desktop - inside Task Manager and see if two are still running.

If none, fine restart BOINC from menu, that should be that for numbers of running BOINC, post and we can move on to the other stuff. If two are there, go to control panel and uninstall BOINC. When uninstalled, install BOINC 6.12.26 being carefull NOT to install as a protected application.

When thats done, and you are sure only one instance is running, check the top of BOINC messages, it should say what kind of Graphics card (if any) it sees. If it says one, NVidia, good to go, run a MW GPU WU and come back here with what happens.

When you come back - start a new thread for your issue as your's is a user fault, and not to do with the thread topic - want avoid derailing the thread.

Regards
Zy