When you try to install something and get the error laike this
Error 1935. An error occured during the installation of assembly component{303994BA-6487-47AE-AF1D-7AF6088EEBDB}.
All you have to do is
open a cmd-window and enter the following two lines:
msiexec /qn /x {35343FF7-939B-401A-87B3-FF90A5123D88}
msiexec /qn /x {2AEBE10C-D819-4EBF-BC60-03BF2327D340}
Close and restart. Yes: you must restart (I hate it as much as you do).
Now install the msi.