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I am using Windows 7 64 bits and Chrome browser.

When I try to install Adobe Flash player I get this error:

"NSIS Error The installer you are trying to use is corrupted or incomplete. This could be the result of a damaged disk, a failed download or a virus.

You may want to contact the author of this installer to obtain a new copy.

It may be possible to skip this check using the /NCRC command line switch (NOT RECOMMENDED)."

Any idea what is the problem?

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3 Answers 3

I've had that issue with other programs on machines with rootkits.

Invalid installers are often (but not always) corrupted because they a)didn't finish downloading, or b) have been modified by a rootkit or virus.

I don't want to sound like I'm parroting the error message that you got. I've seen this on a Windows XP machine while installing various antivirus programs to clean up a rootkit.

The virus kept "eating" at the installers. I downloaded to a disc on a another machine and it ran some of the installers that way. (Incidentally, the end result was a reinstall anyways - the virus was just too much for the machine.)

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I have occasionally had the same issue with Firefox and Norton combination. Sometimes Norton's scan prevents the file from downloading completely though Firefox renames is from a .part to the expected type. –  jtreser Mar 14 '10 at 13:26

Adobe does not officially support that combination of browser and OS. Although you should verify you are downloading the appropriate installer then check out the supported browsers. Listed for Windows 7 is:

Microsoft Internet Explorer 8.0 or later, Firefox 3.x or later

although you could try installing it in Vista compatibility mode, it's worth a shot.

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Flash and windows 7 64 bit and chrome is working at home but not at work. –  Imageree Oct 28 '09 at 9:08

I have Flash working in Google Chrome in Windows 7 (32 bit).

You could try uninstalling flash then reinstalling.

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