The game crashes after the Bethesda logo, after installing dawnguard(when I uncheck dawnguad games works fine).

• I have no mods
• I did verify integrity of game cache

Is there something more I can do?

Is Update.esm checked in the data files as well? Load order correct?

There is no Update.esm in Data files from the launcher, but it is in Data folder and in load order.

Load order:

1. Skyrim.esm
2. Dawnguard.esm
3. Dragonborn.esm
4. HearthFires.esm
5. Update.esm

Edit. I checked other dlcs, and it doesn't work with any of them, it only works if it vanila game.

Ok problem solved. just go to your Skyrim folder, find Data, and then in Dragoborn.esm, Dawnguard.esm, HearthFires.esm, edit them with notepad and change TES4 to TES5. I know but it did actually work.

Thats not the issue, make sure update.esm loads after Skyrim.esm

Update.esm doesnt show up in the launcher mod list.

If that is an accurate load order, the problem is the load order.

Dawnguard and Dragonborne depend on Update.esm. I dont think Hearthfire does.

So, Update.esm MUST load first. The same applies to dependencies of any mod you use.

The dependencies MUST load first. If not, you will get crashing after the logo.

If you editted your .esm files with notepad, then you corrupted them. Ill bet you will crash at some point if you try to do any of the DLCs.

You should use TES5Edit or the SKyrim Creation kit when editting .esm files.

Yes, that's correct. Update.esm should load after *Skyrim.esm as all DLC's (except Hearthfire) depends on it. (*as it's a master file)

Have you sorted your load order with BOSS or LOOT ???

As Jasper said: Why would you open an .esm file with Notepad ???

I would completely uninstall Skyrim at this point and reinstall, including all of the DLCs.

I agree with a fresh install of Skyrim since you are likely going to have a lot of issues if you edited an .esm file with notepad. I do not even clean them with TES5Edit.