Seems to be limited to 64Bit systems only, my Win7x64 is not yet affected though (Win 7 Professional, German, IE9, no emergency Update popped up and nothing on manual search) but I use hybernation and usually reboot once per month (after patchday).

On affected systems the aswSP.sys with digital sign of June 24th seems to be the problem for whatever reason (missing Windoze digital signature updates perhaps).