Q: What should I do when I see this error message: "Unknown error. Program cannot set property into main Storage"?

A: Solution described in this FAQ should not be used with the program version 4.7.
This error message is displayed when your ODBC drivers are too old, or damaged, or if they aren´t installed properly. avast! before version 4.7 uses these drivers by default. There are two solutions for this problem:

• Install current ODBC drivers provided by Microsoft. You can download them from this page.
• Don´t use the ODBC drivers, use XML instead. To make avast! use XML drivers, follow these steps:
  1. Open the file avast4.ini located in C:\PROGRAM FILES\ALWIL SOFTWARE\AVAST4\DATA in Notepad.
  2. Find the section [COMMON]
  3. In this section, change the line
     Database=ODBC to Database=XML
  4. Save the file
  5. Restart your computer