Infected by viruses is very annoying. Yesterday I helped my friend to remove virus on his computer. After I clean up the virus with
antivirus, there is still a problem, virus has changed the Windows system registry, and makes the folder option "show hidden files and folders" doesn’t work. It means that when I select (checked) the show hidden files option and click apply, it always rolls back to "Do not show hidden files and folders". Have you experienced the same problem? Don’t worry, in this post I want to share a trick to
enable show hidden files and folders and cure your system registry, so you can show again your important files, such as hidden Microsoft word, PDF, txt, movie files, Microsoft PowerPoint and etc.
First of all, make sure that you have removed all viruses with antivirus, otherwise virus probably won’t allow you to access / edit the registry editor and this method will not work. Then apply these following steps to solve the "show hidden files and folders" problem:
1. Click start menu button
2. Choose "Run" if you use Win XP, or click start search for Vista and Windows 7
Type "regedit" in the box then click / press enter to open windows registry editor

3. Browse to the following folder
My Computer \ HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Explorer \ Advanced \ Folder \ Hidden \ SHOWALL

4. Look at the right window
- Change the "CheckedValue" data value to 1.
- Make sure that the "DefaultValue" data value is 2.
- And make sure that both of CheckedValue and DefaultValue is "REG_DWORD" type. Also make sure that name value "Type" has REG_SZ type and has "radio" data value.
5. Done...

Now open windows explorer - go to Folder Option – click tab "View" and select "Show Hidden Files and Folders" then click apply. Now you can see your hidden files again :D Don’t forget to update your antivirus regularly to prevent this problem.