It is six days ago, I contacted Acronis Support by filing out a Web-Form. They still haven't made contact. Fulco Uninstalled "Acronis Backup & Recovery Advanced Server SBS Edition" (SBS 2008 SP1): (1) All but one vss writers missing (only "MS Software Shadow Copy provider 1.0" vssadmin list providers) (SBS Backup fails!) (2) Network configuration destroyed: both NIC (WAN=public internet; LAN=intranet) are missing from "Manage Network connections", cards are running fine under "Device Manager". NIC are not visible; can't configure "Routing and Remote Access": no Interfaces (so no routing, Client can't access internet) Tried: -(no errors were given during installation and un-installation!) -Reinstall NICS. -Used netsh to get some network functionality back. -AcronisCleanup and article on the net to cleanup registry -HKey_Local_Machine\SYSTEM\CurrentControlSet\Control\BackupRestore DWORD UseMicrosoftProvider=1 -MS kb 940184 about fixing vss writer problems Server is now unusable!