Engine oils should be changed at 3000 mile intervals, to ensure that your engine doesn't suffer from undue wear and tear. Some folks even suggest that it should be changed every 2000 miles. If this seems a little extreme just think about how much it will cost to replace your engine should you have a catastrophic failure due to excessive engine wear! The actual oil change interval is up to you but I wouldn't recommend that you go front window repair more than miles.
First things first the chip should be repaired before it gets filled with grit. To do this, the chip needs to be drilled while the cracks in it get vacuumed. An acrylic or crystalene resin is then inserted via syringe into the chip to restore the air trapped in the crack. Afterwards it is dried with UV light which hardens the substance and reinstates the original state of the glass. Acrylic resin is made up of carcinogenic acid which turns the chips yellow over time. Crystalene resin has better clarity and doesn't change color over time. It's available at ultra-low consistency and high consistency. Extra resin is scraped away and then polished for a finishing touch. This kind of treatment usually runs about $45-$100.
Maintaining your unit really shouldn't take up much of your time. When you find yourself vacuuming your home vacuum your air filter. This could be the single most important thing you do for your unit. Since your unit is sucking air in and filtering, it's a good idea to step outside now and then and wipe down the outside fins as well. Your unit should be turned off and unplugged during this part. If you choose to actually wash the fins or hose them down that is okay too, but be sure to unplug your unit. It is also important that you change windshield replacement the filter every six months. It's a good idea to have your unit maintained by a service professional before cooling season starts every year. This can catch big problem before they start.
Different kinds of damage to a windscreen can have different consequences. If a pane of auto glass has been totally smashed or deeply cracked, it is most likely that a total replacement will be necessary. However, this kind of severe damage is actually quite uncommon. Typically, the windshield chip repair will have been subtly damaged a long time before it cracks or breaks. Many windshields are composed of two panes separated by an inner layer of plastic. Typically, if both panes are cracked, a replacement is necessary. Surface cracks which affect only the outer layer can be repaired quite easily.
Window 7 also offers a way to access previous versions of data files or a previous state in time, or called a System Restore. These features are not part of Backup and Restore, but when you add it all up, what you have is the makings of a full-featured data recovery software suite like Ghost used for many years with Windows XP.
After removing the film, use a hard object that won't scratch the glass to remove excess resin. Something like a plastic scraper or piece of wood, such as a popsicle stick should do the trick.