When I try to download a file using Firefox (v13.0) the download starts fine and the progress shows up in the download window until completion. However, when I look in the folder that I have specified for the download the file is not there even though it shows as having downloaded. I have tried various destination folders without any success. Similarly if I use 'Save as' to save an attachment from Thunderbird it does not appear in the specified folder but shows up in the 'Saved files' window as it is saving. I have 'searched' the computer but there is no sign of the download(s). Could this be related to my switch to BT's broadband? The download problem seems to have started since switching at the weekend. I am using Vista Home Premium SP2, AMD Turion 64 X2 Mobile Tech TL-50 1.6GHz, 1 GB RAM, 32-bit OS.