Sony and Intel were certainly of no help. But HP was. Thanks!
Here's the link:
That's what solved my problem with W7HP64@Lenovo T61p. Thumbs up for HP!
The mysterious thing is that when I went to Intel site trying to download newest drivers there was no newer version. After applying HP driver besides solved problem I got also performance boost - the system boots visibly quicker.
How is it that HP is quicker with the driver than Intel itself?
Never thought software from HP could fix my problems. I'm not even shure how it did it :S