crystal security

a fairly decent security/antivirus program that sports a portable version. it seems to be well-liked over at malwaretips site. it is small and barely has any system impact. it uploads unknowns to virustotal and has some hips protection.

https://www.crystalsecurity.eu/#download-portable

the developer is active here:

https://malwaretips.com/threads/crystal-security-3-7-beta.68421/