When your QB company file won't open, it's often due to file corruption, outdated software, or file location issues, requiring solutions like using the QB Tool Hub (File Doctor, Quick Fix), moving the file to your desktop, running QB as Administrator, or restoring from a backup. Start by updating QB and trying to open a sample file; if that fails, use the Tool Hub for data repair or t... https://hackmd.io/@grumpygilligan/