When opening an existing financial statement in QuickBooks Statement Writer with Excel 2007, you receive the following message:
The file you are trying to open, '[filename]', is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you want to open the file now?
Excel displays this security warning each time you open a QuickBooks Statement Writer (QSW) file because QSW files use a unique (non-Excel) format.
Click the Yes button on this message to open the ISW file safely.