I think you are still dealing with possible malware problems.
Boot into Safe Mode and update and run malwarebytes again.
Do a full scan this time, it will take time but I'm convinced something is still eating at your system.
System Manufacturer/Model Number Insane hobo technologies. ;-) OS Windows 7 x64 CPU Intel i7 2600k Motherboard Asrock z68 extreme 4 gen 3 Memory G.skill Ripjaw 16gigs @ 1866 Graphics Card Nvidia gtx580 (evga) Sound Card Integrated HD audio + hdmi Monitor(s) Displays 24" ASUS widescreen + 42" insignia Screen Resolution 1080p (1920x1080)
Keyboard Microsoft wireless 3000 (v2) Mouse MS - wireless 5000 (bluetrack) PSU 1 kilowatt SLI/Crossfire rated Silverstone modular Case NZXT Phantom + additional 220 fan Cooling Zalmann Hard Drives 128 Samsung 830
256 Samsung 840
3 x 1tb storage drive (various)
1 western digital 1tb (eSATA)
1 Seagate 1tb (eSATA) Internet Speed depends on if you ask me or my provider. Other Info The above information is provided as is, and the author assumes no responsibility for issues it may cause with your sanity or fanboyism.
System Manufacturer/Model Number Fulitsu Lifebook T series/R0832981 OS Windows 7 Enterprise 32-bit SP1 CPU Intel Mobile Core 2 Duo P8600 @ 4.4GHz Penryn 45nm Technolog Motherboard Fujitsu FJNB1EA (Onboard) Memory 2GB Dual-Chan DDR3 77720 Graphics Card Mobile Intel(R) 4 Series Express Chipset 744MB Monitor(s) Displays Generic PnP Monitor (1280x800@59Hz)
"This is an expected behavior if the "Host file change detected" setting in the SONAR component in Virus and Spyware Protection Policies was modified from the default 'Ignore' setting to 'Prompt'."
Bascially since you changed the setting to PROMPT, any legitimate program that needs to access the HOST file will trigger this alert. And if you replied to the alert by clicking on BLOCK, then you now will have crippled a legitimate program.