For many years I have used this program successfully. Now, I have to reinstall it, but I can't due to "INVALID INDEX and I/O Error 183" message. What can I do?
You receive this error because the application is trying to create files that already exist. To solve the issue, run Revo Uninstaller to fully remove the software from your PC. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system. After the removing process is complete, you can reinstall the application without any problems.