Steam wont start..

[scorch-]

What is Rosenquist?

Address access exceptions are usually caused by AV software, viruses, or endpoint protection type stuff interfering with normal software operation. Generally if the software's not being hooked it should be able to run properly.

Open your registry (c:\windows\system32\regedit) and check
HKEY_Local_Machine\Software\Microsoft\Windows NT\CurrentVersion\Windows
and see if you have anything in
AppInit_DLLs or if LoadAppInit_DLLs is set to 1

If you're running a 64-bit OS then do the same in
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Windows

[calli]

Rosenquist is my steam user name.

Got a fresh Windows XP installation now. Installed steam as soon as I had installed all needed drivers.
Still same problem. Steam either crashes as soon as I have logged in and all steam windows are about to launch.. or i get that error message and have to manually close it through task manager.

I''ll try to follow your suggestions scorch and see if it works.. to be continued!

[calli]

What is Rosenquist?

Address access exceptions are usually caused by AV software, viruses, or endpoint protection type stuff interfering with normal software operation. Generally if the software's not being hooked it should be able to run properly.

Open your registry (c:\windows\system32\regedit) and check
HKEY_Local_Machine\Software\Microsoft\Windows NT\CurrentVersion\Windows
and see if you have anything in
AppInit_DLLs or if LoadAppInit_DLLs is set to 1

If you're running a 64-bit OS then do the same in
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Windows

AppInit_DLLs have no value at all.. What should it be?

[scorch-]

There shouldn't be any value in it. If you have some types of software installed, you will see some value in there and it may cause issues with other software products. It looks like that's not the case.