Hi, The update from app store may not only solve his problem, but all win 8 users problem. Real wonder that you included in the All in one repair.
May be an update, but did you see the problem of the same nature was cured by using All in one and minor correction in regedit, in the link i provided in my post?
aLL IN one tool would be a boon for win 8.
Is the trial advised by you have been incorporated in All in one.
Will the tool, the updated tool by you in this post, also help win 7 and other users. I have run the trial first and found no missing files. But i have not tried the updated , which you have promised to release in the latest version of AIO. I will update to the latest.