The QuickBooks windows freeze for several reasons. It may be a corrupted file or a filename error. Thus, try fixing the issue of QuickBooks won’t open by renaming the.TLG and.ND extension files: Open the company files. Right-click on the transaction log file to rename it. Change the.TLG to old.qbw.TLG. Follow the same procedure for the.ND file. Now, try opening the company file again.