.rwmb-label, .rwmb-input{
    float: right;
}
label.error{
    padding-left: auto;
    padding-right: 3px;
}
.rwmb-button.remove-clone {
    right: auto;
    left: 0;
}
<b>x<br><br>Windows NT KPTV 6.2 build 9200 (Windows Server 2012 Datacenter Edition) i586<br></b>