_tbl_simple.so is a developer file used with ToroiseSVN, a source control/version control software usable with Microsoft Windows. .so files are source files that are used with the C/C++ programming language.
_tbl_simple.so is not a dangerous file as-is. However, it can become damaged or out of date. Also, some virus and spyware programs try to disguise their files as legitimate files. They may try to disguise themselves as this one, which would invalidate the real one and leave it that way even after the virus is removed.
Anti-virus programs do not heal damaged registry files, even when they remove the offensive virus. A registry cleaning program is needed for this. ZookaWare PC Cleaner offers a free scan for your computer, and a 60-day money-back guarantee on the paid version of the software.