Windows 7 RunDLL error

I have an ASUS laptop that runs Windows 7. Lately, I keep getting 3 error messages every time I start the computer, saying:

"RunDLL - There was a problem starting C:\PROGRA~1\COMMON\-1\System\SysMenu.dll"

I called Microsoft customer support. They said there was a virus on my pc, but that they'd charge about $200 to remove it - almost half what I paid for the pc to begin with. Can anyone suggest an alternate solution?
 
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