Enable Show Hidden Files Option

If you can’t enable Show Hidden Files from folder options (due to virus attack or for any other reason), you can do it by editing the registry. Just follow the following steps:

Start --> Run , type regedit then press OK. The registry editor will open. Go to the following key:

HKEY_LOLCAL_MACHINE\SOFTWARE\MICROSOFT\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden.

Expand Hidden and select NOHIDDEN. In the right hand pane, see if there is a value called: CheckedValue and delete it. Right click in the right side pane and select New--> DWORD VALUE. Name it exactly as CheckedValue. Double click on it and put 2 as its value data.
Again at the left panel select SHOWALL, look for the key: CheckedValue and delete it also. Like the previous make a new DWORD, Name: CheckedValue . Double click on it and put 1 as its value data.

After doing these steps Open My Computer and from the upper panel and choose Tools>Folder Options. Then put a mark on Show Hidden Files.
Hopefully you will see your Hidden Files.

But you have to remember one thing. If you have virus running in your system then you should remove them first. Otherwise there is every chance that after restarting your system the virus will Hide your Hidden Files again.

Related Posts:

Restore Missing Folder Options.
Manually remove ckvo.exe virus.
Disable "Registry Editing Has Been Disabled By Your Administrator" Message