The error “Installer check has failed.
This problem commonly appears when trying to install executable files of windows installer.
The error message comes with:
The installer has failed a self-check, , the installer file has been altered from its original form.
When installing application, the software would not continue.
Most of the time, the executable file has changed its normal sized into something:
“for example the 2048 kb files was changed to 400 KB or less”
You can check the specific file by right clicking on it and select properties. If the files change something like this, the file is corrupted and you need to get one to be able to install it.
The common problem why it happened because the file is infected by worm or viruses.
If you have multiple executable files in the same network, the probability of being infected is high.
But not all NSIS Error is malware problem
If you are receiving this problem from an installer located on a DVD disc, the problem may be due to a hardware failure or physical media being damaged.
Try inserting files from other computer media. If you still receiving read errors with other files on the disc, then the problem is likely due to damaged media.
You can install the installer file by bypassing the corruption test. Go to Start->Run, type cmd and hit Enter. Drag the installer into the window, hit Space and type /NCRC. Hit Enter again and the installer should start. But most of the time the installation will be fail at the end part.
To avoid this issue here’s what you can do:
- Compress installer file such as games, application or any exectable files
- always update your anti-virus definitions
- always update operating systems to protect against malicious program
- make constant backup of your files
More information at: http://nsis.sf.net/NSIS_error”