For the last few days, my Vista-based PC has been running extremely slow only when the BOINC Manager is running.

By slow, I mean it takes 2 seconds for the mouse to respond or for the Windows GUI to react.

If I exit the BOINC Manager (via the tray), all is normal. This is highly repeatable.

I deinstalled BOINC and reinstalled the latest version. No change.

I thought it may have been related to the new Microsoft .NET Framework Service Pack, but I did a Restore back to before it was installed and there was no change.

I'm out of ideas.

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What projects? What version of BOINC? Are you using CUDA?

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Kathryn :o)

* I only run the SETI project (I'm in the top 2% worldwide)
* BOINC v6.4.5, x86
* Yes, I have an nVidia card and it's running BOINC in CUDA

* Yes, I have an nVidia card and it's running BOINC in CUDA

Most likely that's your problem. Go to the Seti boards. It's being discussed to death there.

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Kathryn :o)

It was not CUDA which was causing my problem; I disabled CUDA and it made no difference.

I uninstalled BOINC and deleted the BOINC registry settings, restarted, and reinstalled BOINC. All is good again. I have no idea what was the root cause issue.