browse through your pictures using the thumbnails view in Windows

This is a simple way to enlarge them as you wish:
1. Go to Start, Run
2. Type in the command box: regedit
3. Double click on HKEY_CURRENT_USER
4. Double click on Software
5. Double click on Microsoft
6. Double click on Windows
7. Double click on CurrentVersion
8. Double click on Explorer
9. Right click in the right side window (somewhere on an empty space)
10. Select New, then DWORD value
11. Rename the new value ThumbnailSize
12. Double click on it
13. In the opened menu, select Decimal in the Base field
14. Set the value in the small box to 255.
15. Click OK and enjoy your giant-sized thumbnails