What is "sandboxie"

Sandboxie is a sandbox-based isolation program developed by Invincea (which acquired it from the original author Ronen Tzur), for 32- and 64-bit Windows NT-based operating systems. It creates a sandbox-like isolated operating environment in which applications can be run or installed without permanently modifying the local or mapped drive. An isolated virtual environment allows controlled testing of untrusted programs and web surfing.