can't get online at work now as there is stuff on this site that has been deemed "unappropriate" for work pc's to view so forget that

mainly i use this pc which is vista and ie8 and this is the one that just get's random log outs

for example, i'll log in, read some posts, go to reply to one and then, when i press the "post reply" button i get told i'm not logged in

or i'll be looking and change from one page to another and i'll be logged out

BUT

in another window that is open and also on pf, i can post a reply and it will keep me logged in

just don't make sense