Deleting .sys files?

Trying to clean up a Lenovo All-In-One, running 64 bit Windows 8.1 that was overrun with malware & I'm left with 2 stubborn files that I can't delete.
They are cmwr.sys & cmwf.sys. When I try to delete them, I get the message 'The file 'cmwr.sys' is too large for the destination file system'.
Any suggestions?
Thanks!
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gromackAsked:
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Joe Winograd, Fellow&MVEDeveloperCommented:
Try Shift-Del. That will avoid sending it to the Recycle Bin, which may avoid the "too large" message. Regards, Joe
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gromackAuthor Commented:
That did it, Thanks!
Just out of curiosity, why wouldn't it have given me the 'too large for the recycle bin. do you want to permanently delete it' message?
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Joe Winograd, Fellow&MVEDeveloperCommented:
> That did it, Thanks!

You're welcome — glad to hear it!

> why wouldn't it have given me the 'too large for the recycle bin. do you want to permanently delete it' message?

Good question! I don't know the answer. Certainly would have been the right thing to do at that point.
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