If you developed crystal report in VS2008 for your web project and you need to deploy it on production or test server where VS is not installed. You need to install crystal runtime on server in order to view your report. Crystal runtime can be found very easily on development machine.
C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages\CrystalReports10_5
CRRedist2008_x64.msi (For 64 bit Machine)
CRRedist2008_x86.msi (For 32 bit Machine)