I just install windows 10 on my friend's laptop, but it has some issues.
- Preview windows don't appear when hovering on taskbar icons.

- Left clicking on taskbar icons does not work, the preview windows appear momentarily then disappear right away, this makes me impossible to switch windows to one of the combined ones by clicking on the icons.
Normally it would be like this, but on this machine the two preview windows would disappear.
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- I can't right click any items on start menu, so i couldn't run as administrator , or add shortcut to desktop.

I have confirmed that there's no problem with the installer (iso i downloaded from ms) as i worked perfectly fine on other machine (all of which are laptops).