You may also need to make sure you are using a "Windows Aero Theme".
If none of that works I'd advise to check your file associations. Right click on each of the 3 SOLIDWORKS file types, choose 'Open with...' and select SOLIDWORKS Launcher from the list. If you can't see it, browse for it. The default location is:
Hi Dimo,
This could be a windows setting. Please check the setting documented here:
http://www.guidingtech.com/12253/turn-off-windows-7-taskbar-thumbnail-previews/
"Enable Desktop Composition"
You may also need to make sure you are using a "Windows Aero Theme".
If none of that works I'd advise to check your file associations. Right click on each of the 3 SOLIDWORKS file types, choose 'Open with...' and select SOLIDWORKS Launcher from the list. If you can't see it, browse for it. The default location is:
C:\Program Files\SOLIDWORKS Corp\SOLIDWORKS\swShellFileLauncher.exe