Microsoft Standalone System Sweeper download size is 250MB only and comes with both 32 and 64 bit version. If you want full antivirus solutions, you can check this free Antivirus software list to protect your system on real time basics. This Microsoft bootable antivirus CD / USB is extremely useful for those windows users can’t install install or start an antivirus solution on your PC, or if the installed solution can’t detect or remove malware on your PC.īesides that, Microsoft Standalone System Sweeper Beta is not a replacement for a full antivirus solution providing ongoing protection it is meant to be used in situations where you cannot start your PC due to a virus or other malware infection. System Sweeper, Microsoft bootable antivirus CD / USB that helps Windows user start an infected PC and perform an offline scan to help identify and remove rootkits and other advanced malware.