Problem: Article: A Startup repair will reinstall essential system files that Windows uses to boot. This could fix the black screen problem you're experiencing. If you time this correctly, you'll enter the Advanced Boot Options menu. If Windows tries to load, you'll have to reboot and try again. If you can't open this menu, you can boot from a Windows 7 installation DVD or USB installation drive and select "Repair computer" from the Setup menu. Your regular keyboard should be selected by default. Logging in as an administrator will give you access to the Command Prompt as well as the other repair options. Depending on what errors Startup Repair encounters, you may be given different options. In many cases, Startup Repair will fix problems without your intervention, and your computer will reboot one or more times. If Startup Repair prompts you to perform a System Restore, click the Restore button and select the most recent restore point. After Startup Repair has finished any of its repairs, try rebooting and loading Windows. If you still are unable to boot into Windows, you may want to consider performing a clean installation. This will delete all of the data on the drive, so use Safe Mode to back up any important files first if possible.
Summary: Reboot your computer. Rapidly tap F8. Highlight Repair Your Computer and press Enter. Select your keyboard type. Select the user you want to log in as. Click the Startup Repair option. Wait while Startup Repair scans your computer. Follow any prompts for repairing problems. Try logging into Windows.

INPUT ARTICLE: Article: Inside the body of the car you'll find two interlocked circular gears, the small metal pinion, and the larger plastic spur. Unbolt both gears and lift them out of place to make room for their replacements. Since speed is your goal, you'll get the best results using a larger pinion (with a larger number of teeth) and a slightly smaller spur (with fewer teeth). If you're more focused on improving your car's acceleration than maxing out its top speed, go with a smaller pinion and a larger spur. You'll be sacrificing a little bit of velocity, but you'll make up for it with more precise cornering and cooler running temperatures. Changing the size of the gears is one of the simplest and least expensive ways you get your car running faster. Unscrew the bolts holding the wheels in place and slide the wheels off the axles. Remove the washers from the ends of the axles, then use a Phillip's head screwdriver to open the housing around the drive shaft and pop out the bushings inside. Insert four high quality ball bearings and reassemble the drive shaft and axle. Most consumer-grade RC cars are outfitted with cheap brass bushings that turn the wheel on the axle. These bushings aren't designed for high-output performance, and can slow your car down drastically. The ball bearings are able to spin more freely than bushings. This eliminates drag, which can reduce engine strain, and increase battery life. While you've got the wheels off, consider trading them out for a new-and-improved set. Select wheels with a tread that's suited to your preferred racing style. That way, you can be sure that they'll hold up under the most demanding conditions and make the most of the speed offered by your car's other modifications. Full spikes will offer more traction on uneven surfaces like mud and damp grass. Mini pins perform well on carpet, turf, and other uneven terrain. Bald, slick treads and softer tire types are the best choice for hard, smooth paths like paved roads. If you're looking for a good all-around tread, try mini spikes. They strike a balance between speed, grip, and maneuverability. Consider swapping out the stock frame of your RC car with a lightweight alternative such as aluminum or graphite. These materials will reduce the pressure on the wheels, which means they won't slow down the car as much as dense plastic and heavier metal pieces. Keep in mind that the lighter your car is, the less traction you'll have when changing direction. If you're skilled with a rotary tool, use it to cut off unnecessary plastic sections of the chassis and surrounding body, like the bulky area around the battery socket or the speed control tray. Trimming the majority of the bulk from the front end of the car can also help make it more aerodynamic (and also make it less likely to flip over when stopping at high speeds).

SUMMARY: Alter the gear ratio. Replace cheap bushings with ball bearings. Switch out the wheels. Remove excess weight.

In one sentence, describe what the following article is about: Distributing the weight so that the lightest items are at the bottom, he heaviest items are centered between your shoulder blades and the medium items are stashed around them is the best way to keep your back healthy. If you pack the heavy items first, you'll be putting a lot more strain on your back. Packing the heavier items right along your upper spine situates the weight of the pack on your hips, rather than in a place where it would cause injury. If you're camping overnight, pack your sleeping bag and other light sleep-related items first. On top of those, pack your changes of clothing, extra socks, extra gloves and so on. Pack the heaviest items: your water, your flashlight, your heavy cooking supplies and so on. These should be centered between your shoulder blades right up against your back. Then pack medium-weight cooking supplies, food supplies, your first aid kit, and other medium-weight items so that they surround the other items and stabilize your pack. Wrap flexible items like tarps or clothing around the heavier times to keep them from shifting as you walk. There are a few items that you'll need to have handy, so even if they're light, they should go on top or in the outer pockets. You'll want food and water handy, as well as your map, GPS, flashlight, and a few first aid items you anticipate needing. Pack these items carefully so you know just where they are when you need them. After a few days on the trail, you'll get a better sense of what you need to be accessible and what you don't. Rearrange your pack as you go so that it's packed to be as convenient and comfortable as possible. If the gear you have won't fit in your backpack, you can attach it externally by strapping it to the top, bottom or sides of your pack. For example, you might want to attach your tent poles to the top of your backpack, or hang your water bottle from the side. If you choose to attach items externally, there are a few things to keep in mind: Attach as few external items as possible. It's better to pack everything you can, since as you hike you'll end up catching your gear against trees and other obstructions. Keeping it contained makes for a more comfortable walk. Follow the rules for weight distribution. For example, attach your heavy tent or walking poles to the top of the pack, not the bottom. Lift the pack onto your body and tighten the compression straps to a comfortable position. Walk around to see how it feels when you carry the pack. If you can walk around comfortable, and the pack feels compressed and secure, you're good to go. If you feel things shifting around, remove the backpack and repack the items so they're more compressed and stable, then try again. If the backpack feels tippy, remove it and repack it so the heavier items are centered between your shoulder blades right against your spine. They were probably too high in the pack before. If it feels off balance, repack it and try to distribute the weight more evenly on either side. If it's way too heavy, think about what you can leave behind. If you're walking with a group, see if someone else has room to bear some of your load.
Summary:
Pack the lightest items at the bottom and the heaviest close to your back. Keep essential items immediately accessible. Attach external items. Check the pack to see how it feels.