Hello! I have a user who just moved to a new laptop after the old one broke. He was able to combine files as a PDF on his old computer, but on the new one, it has started pulling up this error. We are running Acrobat XI Pro with O365. Of the 5 files he tried to combine, 3 of them worked, but the 2 Excel files were the ones coming back with the error. We have ran up to the newest update and have also installed the C++ runtime linked previously in this forum. Are there any other workarounds for this?