It’s always good idea.
But most of what it can detect now is maximum some configuration file of malware because active malware you shouldn’t have.
And, about the pen drive, now, can I use it normaly? Because before making the whole process, I formatted it.
Check USB storage devices / removable drives
Download MCShield from one of the following links:
MyCity - Official download link
Softpedija - Mirror download link
[*] Double click MCShield-Setup to install the application.
[*] Wait a few seconds to MCShield finish initial scan.
Recommendation to under General and Scanner tab you click on Defaults button to choose recommended options.
[*] Connect your USB storage devices to the computer one at a time. Scanning will be done automatically.
When all scanning is done, you need to attach a logreport that has made MCShield.
Start → All Programs → MCShield → Logs
Attach here → AllScans.txt
Explanation: USB storage devices are all the USB devices that get their own partition letter at connecting to the PC,
e.g. flash drives (thumb/pen drives, USB sticks), external HDDs, MP3/MP4 players, digital cameras,
memory cards (SD cards, Sony Memory Stick, MultiMedia Cards etc.), some mobile phones, some GPS navigation devices etc.