I have next configuration: HP ProBook 450 G1 laptop with ATI HD 8750M graphics card.
After installing windows 7, and all drivers available from HP support page, problem started. After I enter my user password, it takes roughly 7 minutes to show desktop and another minute or two for computer to become responsive. I can start Task Manager, and from there I see explorer.exe (because I googled some users don't have that process started).
I know this is similar to all those "black screen" problems but it is again different.
What can I do to resolve this issue?