The unins000.dat file is a fully legitimate file, which is important for appropriate work of PC's operating system. This file plays an important role in uninstalling programs. Typically, it is copied to the program’s folder when installing it so that Windows could find it there and know how to uninstall the speciffic program when you ask to do that. So, don't forget carefully checking the file before deleting it because it may be essential for different programs to work properly.
Many parasites use files with unsuspicious names for preventing their elimination, so beware that unins000.dat file may also pose a serious danger to your computer's system and your privacy. It may belong to a parasite, whose payload may differ depending on its type. While relatively harmless pests may use unins000.dat to degrade system performance, display commercial advertisements or perform other annoying actions, really dangerous parasites may use unins000.dat to damage your system, infect files, corrupt installed software and violate your privacy. DO NOT open this file!
The unins000.dat file has been used by adware AdvSearch. It may also be related to other parasites, such as keylogger Active Key Logger, keylogger Activity Logger 2.0, keylogger Activity Monitor 2002, keylogger Desktop Scout , keylogger Golden Eye, keylogger I-Spy, Advanced Remote Info, EMCO Remote CmdLine, I-Stealth 3.0, Midnight Oil and INetBar.