Reinstall the system, originally in the D drive or E drive installed programs not showing up

Users questions: Reinstall the system, originally in the D drive or E drive installed program in "Control Panel - Add or Remove Programs" can not show, can not uninstall, in the "Start ** Programs" in the no. How do? In addition, the re- installed system, the original disk in D drive or E can not use any installed programs, intended to discharge the re-Security Installation procedure, but can not unload. Directly delete the folder okay .
Experts answer: normal to the D to E disk drive and delete the file, then re-install a
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