Hi there!
I have update from vb 4.28 to Virtualbox 5 in a host machine with w7 x64.
I have install guest additions for vb5, and during the installation for the first time in many years, I think I saw some alerts like about incompatibility, but the installation finished without a error. I have reinstall guest additions one second time but I do not see this errors again after the problema arise..
I have two guest, one w7 x64 and other w8.1 x64, and this problema is only in guest w7 x64.
And the problem is:
Only in w7x64 guest, when attached a usb 2, I can see the installation was successful but i can not see in my guest OS the usb attached.
When I use a earlier snapshot, like from 4.28 or other everything it's ok.
Thanks in advance.