When you download a file from a website in Google Chrome, a downloads bar appears at the bottom of the tab where you can monitor the progress of your downloading file. If you’re downloading an executable file (such as files with .exe, .dll, or .bat extensions), first accept the download by clicking Save on the downloads bar. This step helps prevent malicious software from automatically downloading to your computer.

To view your downloads history, click Tools menu, then select Downloads, open the Download page (you can also press the hotkey Ctrl + J or type chrome://downloads/ in the address bar), as it is shown in the screenshot:

Screenshot: Google Chrome download Manager page

• Pause a download

Open the Download page, click the Pause link for the download.

• Cancel a download

Open the Download page, select the downloaded file, then click Cancel.

• Clear download history

Open the Download page, click the Clear all link.

Change the default download location for Google Chrome

By default, Google Chrome sets your download location to /Documents and Settings/<user>/My Documents/Downloads. To set a specific location, please follow these steps:

1. Click Tools menu, then select Options.
2. Click the Minor Tweaks tab (or Under the Hood if you’re using Google Chrome Beta).
3. Click the Browse button in the Downloads section and choose a download location.
4. If you’d rather choose a specific location for each download, please check the Ask where to save each file before downloading option.
5. Click the Close button.

Automatically open downloaded files

If you want files that have the same file type as the one you’re downloading to always open after they’re done downloading, click the menu arrow next to the file button in the downloads bar, then select Always open files of this type, as it is shown in the screenshot below:

Screenshot: Automatically open downloaded files in Google Chrome

To prevent potentially malicious files from automatically downloading to your computer, this option isn’t available for executable file types, such as those with .exe, .dll, or .bat extensions.,

Very kind source: http://www.chromefans.org/chrome-tutorial/how-to-manage-my-downloads-in-google-chrome.htm