missing images on files and folders

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Athlon(tm) 64 X2 Dual Core Processor 5200+, AMD64 Family 15 Model 67 Stepping 2
Processor Count: 2
RAM: 4094 Mb
Graphics Card: NVIDIA GeForce 8600 GT, 256 Mb
Hard Drives: C: Total - 381451 MB, Free - 310572 MB; J: Total - 305242 MB, Free - 123707 MB; K: Total - 476937 MB, Free - 354220 MB;
Motherboard: ASUSTek Computer INC., NODUSM3
Antivirus: avast! Antivirus, Updated and Enabled

I used to have photo images on the front of my video files...but I reformatted and they are no longer there. I have made sure that in "folder options" that "show icons" is unchecked.

Any advice?