The best solution is to disable your download manager and avoid right clicking on files. If that doesn't help, try the tips below:
I clicked on 'Download' but nothing happens. I only see a popup
with some text and banners.
Among the text you are seeing in the download popup, there is the mirror list (the list of locations where the file you are trying to download is available). Normally, the download should start automatically after 3 seconds using the first online mirror, and the browser (Internet Explorer, Opera, ...) should prompt you to open or save the file. If the download did not start automatically, just left click on one of the mirrors, and choose "Save" when prompted.
I'm using a download manager and it asks for a password.
You are probably using DAP (Download Accelerator Plus) or some other download manager that does not send some information needed to start the download (the 'referrer'). The solution is to use another mirror or switch to a download manager that properly send referrer information.
I am still asked for a password while downloading files, even if
I'm using other download managers or none at all.
Some firewall programs block the information that download managers send in order to make the download possible (this information is called "referrer" and is basically the URL of the page from where you are starting the download). Zone Alarm firewall is known to block the referrer but other similar products may behave in the same way. The solution is to change, if possible, the settings of the firewall program in order to allow the passing of the referrer to the download server. It that is not possible, temporarily disable the firewall.
While trying to download I get a page that says something about
"Offsite linking". I'm not using a download manager.
You are either using a firewall program that blocks the referrer, or you are downloading by Right Click + Save As... Simply left click on the link, and close firewalls that block the referrer (or change settings).
The download stops before it is complete. Why?
Usually this is because the connection between the server and your computer has been lost. This is caused by a network congestion. You should try again at non-peak hours, or use a download manager to avoid re-downloading the whole file. Here is a list of download managers you can choose from. Another possible cause is that the webmaster of the site updated the file you were downloading. In this case, simply restart the download.
I downloaded the file. What should I do with it?
If the file you just transferred has an .exe extension (the last three letters of the filename), then just double-click it to launch the installation process (follow the on-screen instructions). Otherwise, in most of the cases it is a .zip file (a compressed file which contains one or more files). You will to uncompress the archive to access the installation program. To do so, you need to have installed an archiver (program that handles compressed files) unless you are using Windows 2000 or Windows XP which have builtin .zip support. To get an archiver, go here.
I receive errors saying that the zip file is corrupted. What should
Most likely, in the download process, an error has occurred, and that lead to the corruption of the file. The solution is to re-download the file, and if you are not yet using a download manager, it is good time to do so. Here is a list of download managers you can choose from.