home pc is being hacked

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8.1, 64 bit
Processor: AMD A8-5500 APU with Radeon(tm) HD Graphics, AMD64 Family 21 Model 16 Stepping 1
Processor Count: 4
RAM: 5310 Mb
Graphics Card: AMD Radeon HD 7560D, 768 Mb
Hard Drives: C: Total - 926979 MB, Free - 886068 MB;
Motherboard: LENOVO,
Antivirus: Windows Defender, Disabled

Help please!

I went to open my Microsoft account...and someone else is logged in! I have now ran both anti-malware (Malwarebytes) and anti-spyware (SAS) (nothing in malware, but spyware caught 43 items, which are now gone).

 

Okay, well just found out via Microsoft support that the supposed hacker is actually "...nothing but random Gamertag assigned to your id when you login to Xbox app or create account at Xbox.com. - ...When you log into Xbox services using your Microsoft account, a Gamertag is assigned automatically. So you might not even be aware of this and it might look unfamiliar for you." ...thanks Microsoft...