Set Win Explorer to show all files and folders:
Bring up Windows Explorer / Tools / Folder Options/ select VIEW Tab and look at all of settings listed.
"CHECK" (turn on) Display the contents of system folders.
Under column, Hidden files and folders----choose ( *select* ) Show hidden files and folders.
Next, un-check Hide extensions for known file types.
Next un-check Hide protected operating system files.
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Consider getting and running CCleaner (freeware) from
http://www.ccleaner.com/
Download it, save it, set it up and run it.
When started, select the Windows tab:
Select these options:
Under Internet Explorer: select Temporary Internet Files, Delete Index.dat files
Under System: select Empty Recycle Bin, temporary Files, memory dumps, Chkdsk file fragments
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You are highly urged to follow the steps at
http://www.elephantboycomputers.com/page2.html#Removing_Malware