Problems entering the forum

My co-administrator has asked me the following question:

"I have had a concern about our forum as every time I try to get in here I get an alert from McAfee that it is an unsafe site to enter it and yet it has been checked out and there is no virus on here. Every time I come in here it is so slow and I have to wiggle it about to get my messages on. I have had a full virus scan and a total protection check and it comes back clear. I have also given the whole PC a full clean up getting rid of cache, cookies, temp things etc etc so that should have helped but it hasn't. Everywhere else is OK but not in here. I can't answer it so have you any ideas?"

Can anyone help please?

Which is the forum in question?

Its autumnleaves.englishboard.net

Doesn't seem to have a problem either on my end.

It works for me as well, I get redirected to the login page.

Thanks to all who helped. This can be locked now because we've found that it is the gales in the Shetland Isles to blame!