Bitdefender 60-Second Virus Scanner

" Bitdefender 60-Second Virus Scanner is a lightning fast malware detector that analyzes your PC using a proactive scanning engine.

The application takes only sixty seconds to complete the scanning process, just like its name suggests. It’s compatible with any antivirus software and resource-friendly.

When scans are finished, it displays a report which shows the issues that could cause security breaches. "

They also offer nice collection of free apps.

Another nice one to have from Bitdefender is their Rootkit removal tool.