Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm getting an odd problem when I try to download files from the internet. Typically the file appears to download correctly, but when I try to run it, I get an error message saying

is not a valid win32 application.

On inspection the size of the file is not correct.

Here is an example that I tried 4 times. Only on the 4th attempt did it download correctly:

enter image description here

The file I happen to be trying to download is the .net framework 1.1, but I've had it happen with others. I am using Firefox, but I get the same problem with IE.

share|improve this question
Do you go through a proxy? Can you try "wget" or any download manager? – LatinSuD Jun 6 '11 at 12:54
No. I don't go through proxy. Would really like to understand why it's happening. – Urbycoz Jun 6 '11 at 14:52
up vote 2 down vote accepted

Your picture shows different file sizes -- implies the download failed at times.
Consider using a download manager like DownthemAll

share|improve this answer
Any idea what could be causing it? – Urbycoz Jun 6 '11 at 14:52
network timeouts is one guess. – nik Jun 6 '11 at 16:31
I have DownThemAll installed, and I now get this message for every file I download with it. Firefox's default Download Manager works fine though. – travis May 4 '12 at 16:41

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.