Yep, sorry my bad writings. I'm not blaming the Linkstation from these problems, I understand that I have some problem in my Win 7 (or PC, which I doubt). I was just wondering if someone has bumped into same problems. I'll try to restore settings, but I suspect that it won't help since I haven't changed any settings after purchase.
Just realized one thing. All data added to this Linkstation was done by PC store. They saved my data from that old Linkstation to this new one. Could it be somekinda file system difference error? But how could it not be problem in XP?