don't install the games in c:\program files.

I don't. I always install games on D disk.

Newest driver and in dosbox config try the different output settings

Drivers updated, tried different output settings, nothing changed. Maybe DosBox is colliding with some other program? Is it possible to check by some console or something what dosbox is doing when game freezes?

If it happens in fullscreen only and the game appears to continue working otherwise,
your graphics card/drivers or monitor just can't handle the graphics mode.
197.xx drivers or earlier may better cope with your old card, but that's just
a guess, Dominus already wrote the things that have influence.

I've just installed 260.99 drivers, but games are freezing anyway. About monitor, this problem occurs on my LCD and CRT, so it can't be it.

I've noticed a similar issue in Hexen when starting in full screen. With the 3.25" disk version I only see a Black Screen then DOSBox exits. The CD version of Hexen shows the spine then the menu background but freezes there. Start these games in a window then Alt-Enter into fullscreen later.

It seems that every 3rd time it doesn't have this problem so there's also a random element to it.

Thanks. Problem is that then, for some stupid reason, I cannot lock my mouse, and Daggerfall is working with mouse only.

Ctrl-F10

Hmh, now Daggerfall is freezing regardless of if it is using fullscreen or window mode. -.-

I've just reinstalled my windows 7(not for dosbox, it was needed anyway). I've installed most important programs and some games including Tomb Raider and Daggerfall. Strangely, I have still this very same issue. Can it be driver or hardware related problem?

Oh, c'mon guys. There is really noone who can help? Or haven't I added enough informations? If so, then what more should I add? DirectX reports?
Anything?

Well you have random problems, one time you tell it only happens in fullscreen
then (without telling what you changed) you state it happens always.
If it's really that random you got a hardware problem. If it isn't get your
facts straight otherwise nobody can help you.

Try forcing some fullscreen resolution that you know for sure your monitor/graphics card supports, like 640x480 or 800x600.

They're not random, but I haven't explained it more detailed and I'm sorry for this. Let me explain it:

Tomb Raider:

When fullscreen mode is activated in dosbox.conf:
Game is working ok until the main menu, then, after choosing new game/load game/croft manor and after fmv(in case of new game/croft manor) the game just freezes with the first rendered frame after level loading.

When fullscreen mode is deactivated in dosbox.conf:
Game is working in window mode in every cutscene, but when it comes to the menu/level, then game switches automaticaly to the fullscreen mode and it cannot be changed. After new game/load game/croft manor game freezes(though I can still control Lara), but I've found out that when i click alt+tab and then maximalize game again, I can play it normally! Unfortunately, problem returns if I load game or return to the menu(but if I perform what I've explained before then the game works ok again).
When not using 3dfx patch:
Game works ok.

Daggerfall:
This game is quite a mystery to me. It seems that this game randomly freezes regardless of what settings I'm using. I thought before that game works ok if not in fullscreen mode, but I was wrong. This game can work few minutes after load/new game, but it can also freeze immediatly when I choose one of those two options. I have no idea why it is working like this.

I'm using TR1/UB dosbox Installer by gidierre(http://www.tombraiderforums.com/showthread.php?t=166520) and Daggerfall Installer from uesp(http://theelderscrolls.wiwiland.net/?title=Da … gerfallSetup_EN). If you don't want to download all these installers(they are quite big I must admit) then I give you dosbox.conf files from these two games.

DOSBox + 3dfx patch = unsupported

Regarding Daggerfall use installation package and instructions provided by Bethesda. Your config file for Daggerfall is bad on so many levels (output=surface, mounting ".", running game from root directory, not mounting cdrom).

DOSBox + 3dfx patch = unsupported

This installer is using gulikoza's version which adds direct3d output to the dosbox.

output=surface, mounting ".", running game from root directory, not mounting cdrom

Ok, I've changed everything here except mounting cdrom(this installer do not have cd copy, anyway as far as I know It's not needed to mount it if you choosed full installation and you're starting it with "fall.exe z.cfg") but still it is not working. I'll try original Bethesda version then.

And I'm quite sure that everything was working ok until I've downgraded from 64-bit windows to 32-bit. Though I have no idea why it would be the reason.
EDIT: I've installed 64-bit version and there are still problems with this two games, it must be something else then. Oh and I've found out that it is not dosbox which freezes in Daggerfall but game itself, dosbox is working ok.