ok, riguardo l'mbr tutto ok:
Stealth MBR rootkit detector 0.2.4 by Gmer, http://www.gmer.net

device: opened successfully
user: MBR read successfully
kernel: MBR read successfully
MBR rootkit code detected !
malicious code @ sector 0x4a891c1 size 0x1ca !
copy of MBR has been found in sector 62 !
MBR rootkit infection detected ! Use: "mbr.exe -f" to fix.
original MBR restored successfully !
ora controllo systemscan...