I won’t bother you or myself with detailed descriptions of this build (which you can get on other sites anyway) but I am going to share things I did notice.
1. Team Fortress 2 runs like Usain Bolt, that means fast and smooth! Even faster than my Windows XP. I kid you not. On xp when I enabled Multicore Rendering even though I did not get bigger slowdowns, there was a constant choppiness, the game wasn’t smooth at all. But with this build the difference is very tangible and welcomed. (Just for your information I play at 1920x1200). Another problem which vista x64 and previous build had was hl2.exe crash when exiting the game. That was solved by Valve in some recent patch, it wasn’t microsoft’s fault.
2. That file permission bug I was talking about is still present! That bug really showed up much sooner than expected and that means yesterday (same as install day) all the files in my documents folder were locked (at least there is a nice little icon with a lock so you know they are locked) so I couldn’t view or edit them. But I did manage to fix the problem, more precisely, the symptoms, rather then the cause. But as I can treat the symptoms now, I’m not that much worried because I certainly can’t fix the cause (only microsoft can). So enough with the medical claptrap and onto the solution itself.
Solution to the file permissions problem in windows 7 beta 7068 x64:
1. Download the takeownership.zip from blogsdna.com article. The file included two .reg files and one of them adds Take Ownership to the right mouse click as seen below. You can download those two files individually here and here. You need this reg hack because without it you have to take permission for file after file manually which is extremely inconvenient.
2. Select the folder where you have the locked files and Take Ownership.
3. Go into “Advanced Security Setting for $yourfolder” . Add yourself and administrators. Be very careful to absolutely click on the “Replace all child object permissions with inheritable permissions from this object”. I didn’t click on that checkbox the first few times so it didn’t work for the files in the folder.
4. There is no step 4.
 To get there you have to go to folder properties->security->advanced->change permissions.
As you can see, I’m not complaining about anything else at this time, so stay tuned because something will probably come up.
If you need any help with the file permissions or anything else, be free to leave a comment.