Hi SekeRob - I think you are right - there is a "Suspending computation" message and then "Resuming..." exactly when I moved the mouse to wake up computer. The strange thing is that I immediately set the option to "Run Always" after I saw your response, but the computation still got suspended.

I also see there is a
<suspend_if_no_recent_input>20</suspend_if_no_recent_input>
tag in the global_prefs.xml, and I suspect this is the reason. It's strange that I don't see any corresponding option in the GUI. Either way I'll try to modify it and/or upgrade Boinc (I suspect my version may be a bit old) and see if it helps. Thanks!

26-Feb-2011 11:32:40 [World Community Grid] Finished upload of HFCC_L4_00809064_L4_0001_0_1
26-Feb-2011 11:32:40 [World Community Grid] Finished upload of HFCC_L4_00809064_L4_0001_0_2
26-Feb-2011 11:32:40 [World Community Grid] Started upload of HFCC_L4_00809064_L4_0001_0_3
26-Feb-2011 11:32:42 [World Community Grid] Finished upload of HFCC_L4_00809064_L4_0001_0_3
26-Feb-2011 11:47:05 [---] Suspending computation - no recent user activity
26-Feb-2011 13:09:40 [---] Resuming computation


- <global_preferences>
<source_project>http://www.gpugrid.net/</source_project>
<source_scheduler>http://www.ps3grid.net/PS3GRID_cgi/cgi</source_scheduler>
<mod_time>1254373723</mod_time>
<run_on_batteries>0</run_on_batteries>
<run_if_user_active>1</run_if_user_active>
<run_gpu_if_user_active>0</run_gpu_if_user_active>
<idle_time_to_run>1</idle_time_to_run>
<suspend_if_no_recent_input>20</suspend_if_no_recent_input>
<cpu_scheduling_period_minutes>120</cpu_scheduling_period_minutes>
<hangup_if_dialed>0</hangup_if_dialed>
<work_buf_min_days>0.3</work_buf_min_days>
<work_buf_additional_days>0</work_buf_additional_days>
<max_cpus>16</max_cpus>
<max_ncpus_pct>100</max_ncpus_pct>
<cpu_usage_limit>70</cpu_usage_limit>
<disk_interval>60</disk_interval>
<disk_max_used_gb>4</disk_max_used_gb>
<disk_max_used_pct>80</disk_max_used_pct>
<disk_min_free_gb>0.5</disk_min_free_gb>
<vm_max_used_pct>50</vm_max_used_pct>
<ram_max_used_busy_pct>50</ram_max_used_busy_pct>
<ram_max_used_idle_pct>75</ram_max_used_idle_pct>
<max_bytes_sec_down>0</max_bytes_sec_down>
<max_bytes_sec_up>0</max_bytes_sec_up>
<dont_verify_images>0</dont_verify_images>
</global_preferences>

Yeah, just found it on the website as well and set it to 0. It'll try to provide feedback to Boinc team as well.

It's the default of the "Power Savings" profile and is set to zero in the Maximum Output / Default and Minimum Impact profiles [FAQ http://www.worldcommunitygrid.org/forums/wcg/viewthread?thread=17033 ], so guess you can guess what it's function is with you [likely] having chosen Power Savings at one time ;>)

--//--

edit: inserted [RESOLVED] in post title!

you might try to go into windows power settings and click on the changed ADVANCED POWER SETTINGS. Go down the list and everywhere hybernation and sleep is located change to never.
I use to a long time ago have that problem but this stoped all the boinc idle time..