Microsoft.VisualBasic.Vsa.dll missing / not found error: Unavoidably PC may get infected by virus like Worm:Win32/Darby.A or controlled by malware like Sky PC Booster. After they are removed by antivirus such as VIPRE Antivirus 2012, the infected file Microsoft.VisualBasic.Vsa.dll would be deleted as well so that missing problem is found.

Please remove spaces between words.
Microsoft.VisualBasic.Vsa.dllmissing/notfounderror:UnavoidablyPCmaygetinfectedbyviruslikeWorm:Win32/Darby.AorcontrolledbymalwarelikeSkyPCBooster.AftertheyareremovedbyantivirussuchasVIPREAntivirus2012,theinfectedfileMicrosoft.VisualBasic.Vsa.dllwouldbedeletedaswellsothatmissingproblemisfound.