Error (Net frame?) when starting BTB

[KieferDJW]

Hi everyone!

Everything worked fine, but since two days I'm getting a strange error message when I'm trying to start BTB (not a project - it happens on the main-start!!!). I hope somebody can help me...

Error 1
http://imageshack.us/photo/my-images/849/error1o.jpg/
when you click ok ->
http://imageshack.us/photo/my-images/851/error2w.jpg/

The last installations I made were:
NVidia Texture Tools for Adobe Photoshop
Google Sketchup 8 Pro
Google Chrome

I've installed WinXP SP3 and following Netframe-Updates (maybe it's netframe):
2.0 Service Pack 2:
KB960043
KB958481
KB2418241
KB979909
KB2518864
KB2539631
KB2572073
3.0 Service Pack 2:
KB960043
KB958483
KB976769v2
KB977354
3.5 Service Pack 1:
KB960043
KB953595
KB2416473
KB963707
.Net 4:
KB2539636
KB2533523
KB2478663
KB2473228
KB2468871
KB2572078
.4 Language Pack
KB2478663
KB2518870
.4 Extended
KB2533523
KB2487367
KB2468871
KB2416472