If you found that your windows can't view hidden files / folders even you has enable the "Show Hidden Files /Folders" option in the Folder Option.

Before you done anything please make sure your computer are clean, to make sure that please use anti-virus to scan your computer, because this problem normally was happend because your computer infected virus.

Don't worry the following are the solution for solving your problem, just follow step by step: -

1. Click “Start” -> “Run…” (or press Windows key + R)
2. Type “regedit” and click “Ok”.
3. Find the key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL
4. Look at the “CheckedValue” key… This should be a DWORD key. If it isn’t, delete the key.
5. Create a new key called “CheckedValue” as a DWORD (hexadecimal) with a value of 1.
6. The “Show hidden files & folders” check box should now work normally. Enjoy!

Then your windows become normal loh ~~~