I'm running Windows 7 x86 Home Premium on an HP Mini 210 VT notebook. Windows Update fed Internet Explorer 10 to it, along with other Microsoft product updates, on April 1. (An April Fools Day joke, I suppose?)
I almost always have a single Internet Explorer window open, with anywhere from 3 to 20± web pages tabbed. Most of my page opens are relatively short-lived (collecting data as part of a research effort), so I don't add those pages to my Favorites. When Internet Explorer 9 was in place and I installed software updates and had to reboot, I left IE open at time of shutdown so that the browsing session would be "remembered" so I could reopen it after reboot - which only failed two or three times since I bought the netbook back in 2010, and each of those failures appeared to have been due to unusual circumstances.
Since the upgrade to IE 10, I have rebooted the netbook four times in response to prompts from software updates, and each time IE 10 failed to reopen my last browsing session after the reboot:
April 2: updated ZoneAlarm Free AntiVirus + Firewall
April 11: updated Microsoft products (1st of two batches)
April 11: updated Microsoft products (2nd of two batches)
April 12 (today): updated Apple products
From Help | About:
Update Versions: 10.0.4 (KB2817183)
Product ID: 00150-20000-00003-AA459
I suppose that I could just start adding my opened pages to my Favorites, then delete them when I'm done with them, but I've become very accustomed to the "Reopen last browsing session" feature and want to rely on it.