Contents Details Not Shown in Windows Explorer

i really need help. i've been using win 7 build 7057 x86 for a week

when i started windows today & open the windows explorer,
the display of Libraries is shown like this



the details are gone
so i click the View/Choose Details to sort the contents of the folders
after i pick Name and Size, the display is shown like this



i clicked the other folder, and all of the contents are also missing the details
& when i go back to the folder Libraries, the display goes back blank,
without details just like the first time i opened windows explorer

how do i get windows explorer to show the details of all folders like it used to?
i even did the system restore, but it's still not showing the details of folder contents..

@ gary, thanks so much

but unfortunately, it doesn't work
after i did exactly as you suggested & click another folder,
all other folders don't display any details

& when i go back clicking the folder i've customized earlier,
it doesn't show any details as well

any other suggestion?
or should i do the repair installation?

@ mr grim,

sorry to ask such newbie questions about repair installation,
1. do i have to provide the same serial numbers as the first time i installed win 7?
well, i don't remember the numbers i used

2. am i gonna have to reactivate windows after doing repair installation?

thank you..

Hi,

You can run a little app. from Nir Sofer , which will give you the current product key.

For 32bit:

http://www.nirsoft.net/utils/produkey.zip

For 64bit:

http://www.nirsoft.net/utils/produkey-x64.zip

ProduKey - Recover lost product key (CD-Key) of Windows/MS-Office/SQL Server

Hope it helps.