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   5. Disk type/controller compatibility
You’ve just purchased a new UDMA-66 disk drive, and it doesn’t seem any faster than any of the other drives in your machine. You do some benchmark testing, and the new disk tests the same as the other drives in your system. So what’s the problem?

It could be that your motherboard doesn’t support the UDMA 66 specification. Check your manual to determine what type of IDE interface it supports. If the motherboard only supports UDMA 33, then your UDMA 66 throttles down for backwards compatibility. You can get around this problem by installing a PCI UDMA 66 add-on card and plugging the new drive in to that interface.

Another potential problem may be the cable type you are using. UDMA 66+ drives require a different cable than older drive types. The drive may not work at all with the old cable type. Aged cables will break down over time, especially if they are tightly folded and the temperature of the case remains consistently high. It’s always worthwhile to change out the drive cable to see if performance improves.

Tip
You can now get rounded IDE (and floppy) cables that are less vulnerable to breakage caused by folding and that are less likely to impede airflow. For an example of rounded cables, see 8 Balls Hardware review.

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   6. Windows services
Many Windows services are enabled by default. Many of these services, however, are not required for your machine to run properly. You should review the services running on your Windows 2000/Windows XP computer and disable those that you don’t need.

One way to see what services are running is to use the Services applet found in the Administrative Tools menu. Right-click My Computer and select Manage, as shown in Figure A.

Figure A

Use the Services applet to identify the services running on your system.

Important information contained in the Services console includes the service Name, Status, and Startup Type. You can get more details on a service by double-clicking on it to bring up the service's Properties, as seen in Figure B.

Figure B

The Properties sheet for the service provides detailed information.

You can stop the service by clicking the Stop button. If you are sure that you don’t need the service, click the down arrow in the Startup Type drop-down list box and set the service to Disabled. If you are not sure if you need the service, change the Startup Type to Manual. Then you’ll have the option of manually starting the service if you find that you need it.

Another way of controlling which services start is using the msconfig utility (see Figure C). Open the Run dialog box and type msconfig in the Open text box.

Figure C

Use the System Configuration utility to control the behavior of services.

Notice the Essential column. These are services Microsoft considers essential to running the computer. However, note that many required services are not defined as essential in the System Configuration Utility window. You can prevent a service from starting at bootup by unchecking the check box to the left of the service.

One service that is well known for slowing down Windows 2000/Windows XP systems is the Indexing Service. This service indexes the content of each hard disk and makes it easier for the Search utility to find files. Unless you are running a Web site that uses the indexing service, you may want to disable it to improve performance.