Try this:
look under: C:\Program Files\Condusiv Technologies\ExpressCache
if it is empty:
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Reboot your system.
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Go under:
for 64bit system: C:\Program Files (x86)\SanDisk\
for 32bit system: C:\Program Files\SanDisk\
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Delete the ExpressCache folder
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open the registry: run regedit.exe
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Go to
HKEY_LOCAL_MACHINE\SOFTWARE\SanDisk\
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Delete ExpressCache
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Run ExpressCacheSetup. It should install.
if it not empty:
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Open Programs and Features
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Uninstall ExpressCache (not ExpressCacheApp)
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Now go to step 1. (reboot your system)
Let me know which one worked for you.