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Software troubleshooting is the process of scanning, identifying, diagnosing and resolving problems, errors and bugs in software.
It is a systematic process that aims to filter out and resolve problems, and restore the software to normal operation. It is a subcategory of IT troubleshooting.
Software troubleshooting is generally done to resolve technical or source-code-related problems in software. This can be both functional and non-functional in nature. The software troubleshooting process starts with identifying the problem, checking on possible issues that can cause such problems and then working on measures and alternatives to find a solution.
Typically, issues are resolved by a software developer or tester that reviews and optimizes software, removing bugs and errors from the source code. Software vendors also help in software troubleshooting by publishing periodic updates/patches for software, which can help in ensuring smooth software operation. Software troubleshooting can also be done when software needs to be configured correctly, such as resolving issues due to incorrect installation or restoring software after corruption or file deletion caused by a virus.