If you want to speed up browsing around in explorer, you might think about disabling thumbnail previews in folders.  

Note that this works in Windows 7 or Vista

To make this change, click the Organize button on any folder, and choose Folder and Search Options from the menu.

Click the View tab, and then check the Always show icons, never thumbnails checkbox.

Click OK, and you’re done.

Lowell Heddings Lowell Heddings
Lowell is the founder and CEO of How-To Geek. He’s been running the show since creating the site back in 2006. Over the last decade, Lowell has personally written more than 1000 articles which have been viewed by over 250 million people.
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