if you are using XP, here are some steps you can take to begin to fix this problem... if you are using vista, me, 2000 or 98, the steps should be similar:
go to control panel-
probably click start, settings control panel
if you are not in classic view, click where it says switch to classic view
click system, hardware, device manager.
you will see a list of your parts, anything with an exclamation point has a potential problem.
if you can connect to the internet, do so and RIGHT click the items with the problems, then click update driver, windows will try to fix those problems. if you are not having any problems with any of your parts, (such as sound or modem or video) you can probably just temporarily disable the flaky parts,
just RIGHT click the problem item and select disable.
if you are having a problem with a part that the computer keeps detecting, you may need to locate your computers drivers CD and re-install the driver for the part having a problem.
if you cant find the driver CD, you may need to go online and download the driver for the part giving you the trouble. for instance, if you have a Dell, go to dell.com and find the drivers or support link, and search for your model of computer, such as diminsion 3000, make sure you know your operating system (you can see this information in your system section of control panel)
hope this helps