Having trouble installing Vcenter? If you look in %temp% the log file will give a clue, but it’s not obviosu to look there. Anyway, you need to install dot net 3.5 from the Add Features. You may get an error if you can’t get on to the internet, in that case, stick your CD in and run

Dism /online /enable-feature /featurename:NetFx3 /All /Source:D:\sources\sxs/LimitAccess

Or change /source to point to some network location that has an extract of the cd. Should work then!