Best All Graphics

Everyone with a computer will encounter some type of error or unexplained crash. There are many instances when a user will consider enlisting the services of a computer maintenance expert to fix their problem. Before calling a computer technician, there are a number of things you can try to resolve the error. If the following repair measures do not resolve the problem, you should contact a computer maintenance expert:

1) If you are having a connection problem, your internet provider may be having problems. Check your own connections to make sure a cable is not unplugged. Unplug each of your devices and reconnect each cable to make sure you have a good connection.

2) A message saying your computer is low on memory does not always mean you have to buy more memory. Click on the Task Manager and close hidden programs to free memory.

3) If you have memory errors, run a current virus checker.

4) If your computer crashes, reboot it, and run ScanDisk to see if there is an error. The scandisk will fix the error. You can also defragment your computer. It will put files back in order and free up disk space.

5) If your computer crashes before you have saved your file, use autorecovery to retrieve the lost file. The file may also be located in a temporary file folder. Check your temporary file folder to see if the file is there.  Read more...

If you are like most people, you think
computer maintenance is for people that have something wrong with their computers, not for a computer that is running. Computer maintenance really falls into a few different modes which Ill make an attempt to define.

Denial Mode : Problems? I dont have any problems.

Most computer users / owners only fix a problem after it becomes a crisis for them. That is to say, your computer might be running as loud as a truck for 6 months but it only gets attention after it decides not to turn on one day. The problem that needed fixinghas been there for 6 months and could have been eliminated in under an hour for about $50, but now, it will take more time and more money. There used to be a car repair commercial that had a tagline You can pay me know, or you can pay me laterand to a certain extent is true when it comes to computer repair. There are many things computers do or dont do¦that should alert us as users that there may be a problem than can be easily addressed now but if you wait long enough will be catastrophic tomorrow. Have you ever had a hard drive crash on you? It is one of these OH NO! experiences because most people arent prepared for the options they have. When was the last backup done? Ever? Do you have the Operating System Disks that came with the computer? How many songs were there? Do you even remember how many programs you had installed and operating?  Read more...

Abstract

The dictionary defines maintenance as, “The work of keeping something in proper order.” However, this definition does not necessarily fit for software. Software maintenance is different from hardware maintenance because software doesn’t physically wear out, but often gets less useful with age. Software is typically delivered with undiscovered flaws. Therefore, software maintenance is: “The process of modifying existing operational software while leaving its primary functions intact.” Maintenance typically exceeds fifty percent of the systems’ life cycle cost . While software maintenance can be treated as a level of effort activity, there are consequences on quality, functionality, reliability, cost and schedule that can be mitigated through the use of parametric estimation techniques.

1. INTRODUCTION

One of the greatest challenges facing software engineers is the management of change control. It has been estimated that the cost of change control can be between 40% and 70% of the life cycle costs . Software engineers have hoped that new languages and new process would greatly reduce these numbers; however this has not been the case. Fundamentally this is because software is still delivered with a significant number of defects. Capers Jones estimates that there are about 5 bugs per Function Point created during Development . Watts Humphrey found “… even experienced software engineers normally inject 100 or more defects per KSLOC . Capers Jones says, “A series of studies the defect density of software ranges from 49.5 to 94.5 errors per thousand lines of code .” The purpose of this article is to first review the fundamentals of software maintenance and to present alternative approaches to estimating software maintenance. A key element to note is that development and management decisions made during the development process can significantly affect the developmental cost and the resulting maintenance costs.  Read more...