Did you set the option to lock your internet explorer homepage from changes?
And do you recognise these entries?
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = na.uis.unisys.com
O17 - HKLM\Software\..\Telephony: DomainName = na.uis.unisys.com
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = na.uis.unisys.com
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: SearchList = ent.ds.gsa.gov,gsa.gov,na.uis.unisys.com,unisys.com,uis.unisys.com,na.uis.unisys .com
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: SearchList = ent.ds.gsa.gov,gsa.gov,na.uis.unisys.com,unisys.com,uis.unisys.com,na.uis.unisys .com