First all, Vlk, i saw the warning message of nod 32 with the pendrive. Then, i searched a solution. I found that using mbr.exe fixed it but just scanned the Hard Disk. Using mbr.exe the result was:
Stealth MBR rootkit detector 0.2.4 by Gmer, http://www.gmer.net
device: opened successfully
user: MBR read successfully
kernel: MBR read successfully
user & kernel MBR OK
[b]malicious code @ sector 0x12a14c00 size 0x194 ![/b]
I am talking about the mbr of my hard drive, vlk. Apperentely, the pendrive MBR is ok, I just formatted it. :o