To disable Thumbnail view
Open Windows Explorer
Click Tools
Click Folder Options
Click View
Check Do not cache thumbnails
Click Apply - OK
You can use registry also
Click Start
Click Run
Type Regedit
Navigate to [HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Explorer\Advanced]
Create a Dword entry named DisableThumbnailCache value = 1
Close Regedit
Or if you're in a domain
Open Group Policy using GPEdit.msc
Navigate to and enable User Configuration\Administrative Templates\Windows Components\Windows Explorer\Turn off caching of thumbnail pictures.