To show Hidden files

There is a simple registry entry which can solve your problem.
1)Go to Start|Run
2)type regedit

3)Go to the path given below

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL

4)There you will find

CheckedValue REG_DWORD 0x00000001(2)
DefaultValue REG_DWORD 0x00000002(2)

5)Change CheckedValue value from 2 to 1

i.e.CheckedValue REG_DWORD 0x00000001(1)

It will work