Hi you should be able just to unzip to your drive, no reason why the files should be corrupt. Try the download again. Erica. P.S. I like nvda a lot and use it quite successfully. From: Alistair Sent: Tuesday, December 09, 2008 2:45 PM To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] NVDA PORTABLE VERSION Hi folks, tried to install it onto a thumb drive but only got as far as 47 per-cent jaws reports other files as corrupt, anyone use this programme successfully? Also does it work with vista home premium? I did have a look at the site but couldn't see any such info. thanks! Alistair