Since 12 September I have installed these Windows Updates:
KB2310138 (Microsoft Security Essentials),
KB2553432, KB3118309(Office 2010),
KB3118313 (Outlook 2010),
KB3115467 (PowerPoint 2010),
KB3118316 (Excel 2010),
KB3182373 (Silverlight),
KB3184122, KB3185911, KB3172605, KB3175024 (Win7 x64)
KB3185319 (Internet Explorer 11).
Maybe one of these update repaired that, is that possible?
Today windows started without freeze. I'll check within days if it will freeze again or not.
Strange situation - on my second laptop (Win 7 x64) similar situation appeared few days ago (windows froze on "Welcome" screen and after only 1 reboot worked good - got 1 CBS & SFC total detected corruption count), but from 2 days didn't freeze. This situation was from about 2 weeks now.