File explorer hangs accessing windows folder

[Mojary]

Could anyone help me understand why this is happening? I have stock ROM and haven't really put anything on my tp2 as far as apps is concerned. When I got my phone a few weeks back, it took a little bit for file explorer to open the Windows folder. Haven't gone in there for a while. But when I tried going in the folder again last night, it was just hanging. Even when I left it to do its thing thinking that it might just be because it was the folder which holds just about all the files....but it just had the color wheel turning. Eventually the folder opened up after a few tries and being patient with it to do it's thing. But like i said...when I got the phone, it didn't take that long for it to open the Windows folder. It still took a bit but not as long like last night and not so many tries.

Can anyone help? Thanks.

edit: btw, i have the Sprint TP2 (if that info is needed)