Pre_Scan_PE is the live CD version of Pre_Scan, running under the Windows 7 environment. Pre_Scan removes rogue/scareware/ransomwares. In the case where the rogueprevents any action on Windows (normal boot/Safe Mode corrupt), you can boot on the live CD and disinfect your PC.
The use of Pre_Scan is far more versatile:
It re-allocates hidden files, repair safe mode, removes harmful IFEO (Image File Execution Options), allows control of partitions and their deletion via a script, etc..