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I actually just finished up cleaning a virus from my computer (took me in total like 20 minutes, no big deal), but I'm almost sure this is what caused the problem. Now, whenever I download a zipfile I can open it but it will not extract. The Windows Explorer extractor acts like everything went fine, but all it does is create the folder if it doesn't exist and then extract nothing. I also cannot open any file in the zipped folder.

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Did you try to Repair it? –  Sepahrad Salour May 12 '13 at 15:38
    
Er, not sure what you mean. Repair what? –  Joey Miller May 12 '13 at 16:03
    
What virus? That may help determining if/how it could be related. –  Jan Doggen May 13 '13 at 7:28

2 Answers 2

It sounds like the virus may have damaged Windows. Open up an administrator command prompt. if you dont know how, click Start, then enter in the Run box cmd and hold down Ctrl+shift+Enter. In the command prompt type sfc /scannow. This command will have windows check all its files and replace them if they are damaged.

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Thank you, I will do this now and then update when it's finished. –  Joey Miller May 12 '13 at 16:26
    
Okay, Keltari, so I did that twice and each time it would stop at 58% and say "Windows Resource Protection could not complete the requested operation". That doesn't look good. –  Joey Miller May 12 '13 at 17:07
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No, that doesnt sound good. Personally, I dont trust systems that have been compromised by a virus, especially one thats not behaving well. If it were me, I would back up the important data and reinstall. Better safe, than sorry. Plus, troubleshooting may take longer than just blowing it away and starting fresh. –  Keltari May 12 '13 at 17:40

Try to re-enable the built-in support for zip archives, as described here: http://codesociety.com/2009/07/27/disable-zip-folders-in-windows-7-vista-xp/

If you're using Windows Xp, you must:

  1. Go to Start Menu -> Run.
  2. paste the following command and press enter: regsvr32 %windir%\system32\zipfldr.dll
  3. Restart Windows and return to a life bound by zip folders!

For Windows Vista:

  1. Download vistaenablezip.reg and run it (double-click).
  2. Restart Windows.

On Windows 7 the procedure is a bit more long, see To Enable Zip Folders on sevenforums.com

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