1. Windows 7 64-bit support. 2. Supports updating (not re-downloading the whole thing again). 3. Supports custom scans (context menu preferred, but manual selection is fine) 4. Supports quick scans (if it can be done with custom scans, I'd like to know how). 5. Prefer removal, but not necessary. 6. Does not install unnecessary bloat or anything malicious. 7. Effective at its job (sorry no SUPERAntiSpyware). 8. No duplicates (like Zemana AntiMalware). 9. No automatic actions, especially with false positives. 10. No trials or other limitations on the above. Currently using: Comodo Cleaning Essentials, Emsisoft Emergency Kit, HitmanPro, Malwarebytes' Anti-Malware, Trend Micro HouseCall Why? Cause I can, it's a hobby, for files/folders/drives that won't fit in VirusTotal or Metascan Online, extra insurance, to make a shortlist, etc. Freeware matching most of the requirements will be considered (like the ESET Online Virus Scanner I'm eyeing, which is missing the 4th requirement). Yes, I co-author Probably the Best Free Security List in the World, but I haven't tried the current versions of all the software listed. Plus, I'm always looking for more. Thank you.