Bloccato is dangerous virus, that belongs to the family of ransomware crypto-viruses. It uses AES-256 asymmetric encryption algorithm to encrypt users personal files on infected computer. Virus adds .bloccato extension to all encrypted files and creates LEGGI QUESTO FILE.txt text file that contains instructions to pay the ransom and obtain private decryption key. Ransom is 5 BitCoins or $2200+.
MPC Cleaner is system optimizer and registry cleaner. It is classified as potentially unwanted program due to aggressive advertising, constant pop-ups and alerts and installing without user permission. MPC Cleaner also modifies your browser search engine and homepage settings to search.mpc.am and installs adware application MPC Hot News on your computer.
System Healer by System Healer Tech Sp. Zo.o. is rogue PC optimization utility. It scans your computer and finds several problems and errors. After this, System Healer asks to purchase it to fix this issues. Often, problems that were detected by System Healer do not exist. Along with the fact, that System Healer won't let you uninstall itself normally, constant alerts and messages become rather annoying.