Yahoo messenger wont download it says c file wont open?

i have no idea what to do ,everytime i try to install yahoo messenger it says that c file wont open and i dont know how to fix this i tried everything ,using a different browser,restarting the p.c ,trying a different version of messenger ,and using a third party none of it works i think it has something to do with that c file message but i dont know how to fix it can some one help me

Yahoo messenger wont download it says c file wont open?
You have tried everything... and nothing works so .....





Then delete/reinstall Yahoo Messenger like this --





Manually delete the "Messenger" directory on your C: drive (default), then reinstall the Yahoo! Messenger application.





All archives will be deleted if they are not copied. Copy them like this:





Close Yahoo! Messenger (if it is currently running).





Go to your Desktop and double-click "My Computer."





Select the "C:" drive.





Go to: C:\Program Files\Yahoo!\Messenger\Profiles





Your "Profiles" folder contains your complete Message Archive. Copy it to the a different folder on your computer and save..





Now you can DELETE the Yahoo Messenger by deleting the directory:





Close the Yahoo! Messenger application if you currently have it running. Make sure all instances of Internet Explorer are closed.





Go to your desktop and double-click "My Computer."





Click the "C:" drive.





Go to C:\Program Files\Yahoo!





Highlight the Yahoo! Messenger folder and press the Delete key on your keyboard.





(Your files may now be awry resulting from all the deletions you made. Do a 'Scan Disk' and 'Defrag'.)





TO INSTALL:





Close all running applications except for your Internet browser.





Click the link below to download Yahoo Messenger





http://messenger.yahoo.com/webmessengerp...





Click the "Download Now" button.





Double-click the Yahoo Messenger executable once the download completes to begin the installation process.





COPY MESSAGE ARCHIVE





Go to your Desktop and double-click "My Computer."





Select the "C:" drive.





Go to: C:\Program Files\Yahoo!\Messenger\Profiles





Your "Profiles" folder contains your complete Message Archive. Drag it to the New Yahoo Messenger folder .= Yahoo\Messenger\Profiles.





If after doing all this, it still doesn't work....REFORMAT your computer!!