Maintenance

In The Chasis - Put the HDD away from the PC SPEAKER (to avoid magnetic interference.
Installment - For common users the HDD is non-portable (static), Therefore You should fasten as many Bolts as possible.
Connectors - IDE or SCSI Cable and the POWER Supply cable must be fasten tight into the connector basin over the HDD.

SOFTWARE AND OS LEVEL - AFTER The operration system is loaded (i will mostly relate to Windows based).

Partitioning - I have decided to put it here because better partitioning your system makes it better and faster.
NEVER!!!!! use non Fat16 systems - Fat 16 is slow, old and makes problems. BUT It can be operated by all other OS (e.g. NT, DOS).
Make first Partition The Bigest (e.g 2Gb) and other logical partition (upon the extended one) less then 1Gb (e.g. Partition<1023Kb).
Doing this you will earn big partition and low disk usage (Cluster size).
HDD Problems - Windows (as you surely know) has a lot of problems in its bases. When Shutting of system, not the proper way, many disk problems accure. Operate SCANDISK to fix those problems.
Defragmentetion - Windows writes the data in the fastest way it can which makes the data scatterd around the HDD.
This problem result an immidiate lose in Performance (The HDD's heads are looking more for information).
To fix this problems use The buit in windows defragmenter. Don't forget to use the full option (it's simply the best).
DMA - If your HDD supports DMA then use it (in most cases you will have to config it).

Fingerprints - Keep your hands on the keyboard and mouse - never point an object on the screen with your fingers.
NEVER!!!!! use cleaning products that can harm your screen - Even a tissue paper is too rough for the screen.
Avoid stretching the cord - Benith the screen there is an "information Cable" connected to your Screen adapter. NEVER stretch it or play with it.
Screen Saver - Define a screen saver in your OS (even a simple one) that will prevent your screen from being burned.

Media - Before Putting papers inside the printer, shake them and sort them (this will prevent papers from Being "Glued" together.
NEVER!!!!! use non roginal Ink Sets, they don't worth the money, they make a lot of troubles.
Installation - When installing the printer it is very important to pay attention for all the little Details.
Dust - Dust is one of the worst enemies of the printer. If you can put the printer inside the closet, it is best.

Pictures - Never use "Rough" pictures who can scratch the surface of the Scanner.
NEVER!!!!! Touch the the face of the scanner Glass.
Dust - Dust is one of the worst enemies of the Scanner. If you can put the Scanner inside the closet, it is best.
Cleaning - If your Scanner Turned dirty buy a special clean kit, and have luck! .

Cleaning - A simple Alcholoic spray (usually called "Contact") will do the work.
Cable - Usually the cable comes with the keyboard is long enough.
But if not don't try to pull it (it can damage either the keyboard or the computer Keyboard exit). If by any case you would like to make the cable larger, there is no problem you can purchase a lengthning cord.
Avoiding Maltreatment - Avoid Droping the Keyboard to the floor (never put the keyboard above you legs it is not argonomic and not healthy to the keyboard).

Location - Purchase a special mouse pad (worth the price) never use it abroad your desk.
Cleaning - Better keep "Michka" from dust it is the worst enemy.
If the Mouse become "Jumpy" open the little Hatch upon its buttom and gently clean the mechanism inside.
Avoiding Maltreatment - Avoid Droping the Mouse to the floor, And also avoid Plaing "Ping-Pong" with its interior ball.

Murphy law "It works better if You plug it in" - Check all the Power-cables, Connectors, Slots, Jumpers etc (~70% of the problems are here).
Check For intrusion - Has your little brother tried to figure out how the computer works?.
Check For Recent Installation - Going steps backwords towards when the problem begun.
if you have installed a new hardware component you should remove it (that way you can surely know that it is making the problems).