Dear sir, I Am recommending You to download The Microsoft Safety Scanner This excellent antivirus tool from Microsoft is containing The same amount of virus signatures like Microsoft security essentials. This tool is designed to run portably from PE environment and is not in conflict with other antivirus or antimalvaree tools. This program will work only 10 days, after 10 days till download date, You will have to download it again free of charge. It is protection mechanishm of Microsoft to allow users to use antivirus tool with latest virus databases. The advantage of this tool is, that it is 100 percently MSAA compatible, it is TAB and arrow keys based GUI, and program Ultra Virus Killer is not goodly accessible. Yes, NVDA can access ALL GUI elements by using The object navigation commands and if user will use those commands in The combination with INSERT+divide and numeric / It is possible to access all parts of it's GUI. But my opinion is, that Microsoft based tool will contain more virus signatures and GUI is fully accessible with screen readers without no need to use object navigation commands. But Yours tool can be also ammazing. The 32 bit variant of this excellent Microsoft antivirus tool can be downloaded from here. http://definitionupdates.microsoft.com/download/definitionupdates/safetyscan...