U may try this:
1. uninstall the driver package.
2. delete System32\WdfCoInstaller01005.dll
3. delete System32\drivers\wdf01000.sys and ...\wdfldr.sys
4. delete registry values All of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Wdf
5. All of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Servic es\Wdf01000
6. Reboot the system and reinstall drivers for your semc flash drive.
hope this will help.