Hello.
There isn't much we can do about activiation, you'll need to ring Microsoft and explain your situation.
You aren't running Anti Virus Software
Please install Avira antivirus otherwise you won't be protected.
1) Antivir PersonalEditionClassic
-Free anti-virus software for Windows.
-Detects and removes more than 50,000 viruses. Free support.
It is strongly recommended that you run only one antivirus program at a time. Having more than one antivirus program active in memory uses additional resources and can result in program conflicts and false virus alerts.