How to Repair "Not a Valid Win32 Application"

By Tyran DeWalt

Issues such as bad files, incompatible files, infected files and hardware incompatibility can cause the "Not a valid win32 application" error. You can repair this error by using manual procedures. This is an issue that even a computer novice can solve. Once you fix the "Not a valid win32 application" error, your PC will return to normal.

Step 1

Take the CD out of the CD-ROM drive if you are attempting to install a program from a disc. Wipe the disc off in a circular motion with a soft, clean cloth. Place the disc in the CD-ROM drive, and attempt to install the software again. Proceed to Step 2 if these instructions are ineffective.

Step 2

Click "Start" and "Computer," and then right-click "Local Disk (C:)." Click "Properties" and open the "Tools" tab. Click "Check Now" and then "Continue" when the User Account Control prompt appears.

Step 3

Place a check by the options "Automatically fix file system errors" and "Scan for and attempt recovery of bad sectors." Click "Schedule check disk" when the prompt appears. Restart your PC, and allow the error-checking tool to scan and repair the problem causing the "Not a valid win32 application" error message.

Step 4

Click "Start," "All Programs," "Accessories," "System Tools" and then "Disk Defragmenter." Click "Defragment now." Allow the tool to defragment your PC. The time will vary, depending on the size of your hard drive. Proceed to Step 5 if Steps 2 through 4 are not effective.

Step 5

Install the program in a different directory if the error appears when you attempt to install a program.

Step 6

Ensure that the file is compatible with your version of Windows. Read the system requirements on the disc or website from which you are installing the program.