I’m having a few problems with my Toshiba Portege right now, so I’ve been digging through my system files more than usual. System file hiberfil.sys is where Microsoft Windows 2K, XP, (and Vista, I believe) stores everything in memory when your PC goes into hibernation mode, so it can pick up where you left off when you return. Typically, this file is quite large, but I was surprised to see mine had grown to 1.74GB’s. Mostly, today’s machines have enough hard drive space so this doesn’t cause undue stress. The problem comes when you go to defragment your hard drive (which you are doing regularly, right?). This huge chunk of space on your disk called hiberfil.sys doesn’t get defragmented. That’s like cutting all of your lawn except a 3′x5′ section somewhere in the middle. The article above will walk you through cutting that 3′x5′ section.
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