Thumbnails,
Open your my pictures location, click on organize on the top left side, click on the
folder and search options, click the view tab and uncheck the top option,
always show icons and never thumbnails, select apply then look for and click the box,
show hidden folders, files and drives click on apply now go back to the general tab section and click on apply to folders and okay.
If the photo thumbnails now show up but look washed out right click them and select properties, on general tab section, uncheck the hidden attribute box, and save.
Return to your my pictures location, change the view of the page on the top right side next to the
question mark symbol, there is another symbol with a drop down arrow, click it and select at least
medium or large icons from the listed options.
Then you can contact mcafee and have them adjust the registry for you in their software scanner,
http://service.mcafee.com/faqdocument.aspx?id=TS101228
Massive resetting of the hidden attributes can be done by right clicking the (my pictures) listing on the folder tree, and select properties, general tab section, check the hidden box and click on apply, this will change all of the files to hidden,
click yes, then uncheck the hidden box and apply, it will remove the hidden attribute from all of your files, click on yes, then save.
If all else fails,
Click the start button on the bottom left or windows logo,
Type in the little explorer box, disk cleanup and hit the enter key,
Once it completes, check the boxes for thumbnails and temporary files, and click on okay confirm with yes delete these files,
Windows will rebuild your thumbnail cache.