Hum... Well I don't know anything about McAfee firewall but if it is like ZoneAlarm you can shut it down and unbeknownst to you there is still a piece running! If McAfee has a similar design, that could be your problem.

You see, the software was changed last weekend and now firewalls all over are having fits with this "New Program". Sooooo it looks to me like the most likely cause is the firewall. Again I don't know anything about the McAfee firewall but there has to be in there somewhere something about program control. That is some bit that watches the IP connection and rides herd on all the programs in your machine that wish to communicate over the network. In that bit, there must already be an approval for the old WCG software but now that WCG software has changed.

Sooooo you need to go into McAfee and find the part that controls program access to the net and approve the new WCG Software. Usually Firewalls and the like provide a browse button that allows you to go to the program files, WCG folder and pick the one with the little green chevron on it. That should do it... (I least I hope )

More information on the WCG Software change is available here .

Well, if he brings up his McAfee Firewall and changes his General Summary to the Application Summary, it should show which applications he has established rules to permit access to the Internet in the last week. This should show the World Community Grid program. If it does not, then either he did not allow it access after the new version was downloaded or it never tried to access the Internet. I thought that turning off his firewall would have eliminated Access Denial as the problem.

mycrofth

Julied: Several days ago the task was completed up to 98% and I
was ready to go to bed so I let the job run and my DSL connection on.
Next day it appeared the job had ended but no new task was down-
loaded by Rosetta. My completed points had not advanced so all I
can assume is there was no upload. Several other postings have called
my attention to the firewall situation which I shall investigate further.
If all else fails, I'll just log out of the Grid and rejoin as suggested by
someone else. I was not aware of the changes made at the Grid
Network about the firewall software situation.

Almost certainly, one of the firewalls is probably blocking the agent. First, it sounds like you are using multiple firewalls (Zonealamr, McAfee, ...) which would possibly cause problems. Also, I would update the firewall you do use to the latest version. For example, I found with McAfee, isome of its compoents (not the firewall itself) would block certain traffic even if you disabled all of their components. Hopefully newer versions would fix some of these kinds of problems. Furthermore, if some sort of blanket blocking rule was inserted, it might be easier to reinstall the firewall than to try to find the particular rule causing the blocking.

So you might try various combinations of disabling and/or reinstalling the firewall you want to use. When you want to see if any particular configuration solves the problem, you need to minimize the World Community Grid agent and then open it again. This makes it expire it's timeout wait for when to next try to communicate. A message box will come up which you can click OK on and then it will try immediately.