Thanks very much for your help,not being very techie,i guess there's a problem over the network,as on a single pc everything works fine.I did try a complete new install but to no avail,i will maybe have to try setting up network again.The only thing,as far as i know because it used to work ok, is i changed my anti-virus software to Mcafee,but apart from that, i'm not sure.As i have said before,many thanks for help.
Andy