Missing software and file drivers is often a leading cause of WP4 file problems. It is highly recommended that you scan your PC using the WP4 File Repair Tool. It will analyze your files and make sure you have the necessary file openers.
WP4 file error symptoms can include the inability to open WP4 files, program lock-ups, crashes, slow PC performance, startup and shut down problems, and installation errors.
Fixing the Problem
To ensure WP4 files can be opened and read by your computer, download and run the WP4 File Repair Tool. Simply click the button below to download the software.