I think Microsoft assigned logo designing team were superstitious and lacked vision when designing that Windows 8 logo.
Otherwise they wouldn't have used that over simplified 2 point perspective & that light blue single coloured logo.
This colour is mainly used to chase bad spirits in the Arab world, Microsoft may have wanted to chase some Gremlins away...?
The logo itself tends to over simplify the window idea down to a boring level.
I wouldn't expect anything more of an up to a 7 year old boy drafting it, while anyone older simply failed to do the job.
It fails to transfer the sophistication that was present in previous logos, a legacy that started in Windows 3.1 and apparently died with the last sophisticated logo - Windows 7 .
My Verdict on the Logo:
UGLY - for Colour choice,
UGLY - for Single colour usage,
UGLY - for over simplified design.