Method 1: sfc /scannow "did not find any integrity violations".
Method 2: is crazy and not acceptable - because of "Note". Who in a normal mind would do something like that to uninstall all programs that are already installed from DVDs etc. A lot of wasted time / reinstalling.
Copy/paste still does not work !
(i.e. in the beginning it works, and then after awhile it stops working. Rebooting PC when you need to copy/paste something is very counter-productive)
Copy/paste is the basic necessity. Microsoft must really priorities fixing that bug.
Windows 8 with all fancy stuff and without basic copy/paste - there are other OS on a market.
Quite unexpected outcome - returning whole new computer because MS cannot fix basic copy/paste bug.
(and provider does not allow to change back to more stable previous win7 version).