I bought the whole series and I decided to start from the first game. It looks promising, but I'm expriencing some problems. First, game doesn't want to start sometimes. Or is it just slow to start? I even try to run it as administrator and even after that game doesn't want to start. I have to use Configuration tool to get the game started. Second, game likes to freeze. I'm just wandering around and game freezes. Is there something wrong with my settings? I'm using Windows 7. Game's version number is 1.0061A. I attached Configuration settings on a picture.

You really shouldn't need to use the configuration tool to start the game after the first time it is run. If you don't have stuff running in the background, etc, there also shouldn't be a huge variation in startup time.

Try uninstalling the game, make sure there are no files or folders left in the Divine Divinity folder, other than possibly the savegames folder, reboot, shut down all non-essential programs and reinstall the game. Try installing the game as administrator, and to a folder outside the default Program Files folder path (like c:\games, or something).

Each save is a separate subfolder in the '..\Divine Divinity\savegames' folder.
Under Vista/7, depending on how the user accounts are set up, if you install the game to the default Program Files path, Windows can create separate savegame folders for each user, and then map that folder to the game's savegame folder (so it will just see the saves for the relevant user).
C:\Users\ %account name% \AppData\Local\VirtualStore\Program Files\Divine Divinity\savegames

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Uncheck the 'Use AlphaBit' option unless you are having graphical problems in the game.

You can try switching to Software mode rather than Direct3D.

Are you shutting down all non-essential programs (especially anti-virus) before starting the game?

If you right click on the shortcut (or executable) for the game and select Properties, in the Compatibility tab you can disable desktop composition, etc, or set it to run in Win98/ME compatibility mode, and see if that helps.

Okay.

I ran the game on Software mode. No crashing, but the game felt a bit too fast. Don't if that's the optimal speed, but I think not.

After that I ran the game on Direct3D mode without AlphaBit. Game ran on normal speed and no crashing so far.

What exactly is this AlphaBit option, if it is the source of crashing?

AlphaBit is a different way of rendering the graphics, if the video card or driver does not support certain features. In the original disk release of the game 10 years ago, some older or lower end graphics cards could have problems drawing the mouse cursor, or there could be black boxes around the character and objects in the game, which the AlphaBit option would fix.