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Try reinstalling the audio driver.
You can download the audio and device drivers from the Compaq/HP WEBsupport/download page. Make sure you select your model laptop and the Windowsdrivers you require and install them. Click on this link to download thedrivers: - www.compaq.com/country/cpq_support.html
boot into safe mode and run CMD.exe and type in CHKDSK and run that program to fix any errors. If there still is a problem. Grab the CD in your computer came with and install it. What I mean by that, is insert a disk into CD-ROM drive. Before turning off computer. Turning on computer and booting from CD to fix any errors. If that doesn't work reinstall Windows. Please rate me for assisting you today have a great day. :-)
Rundll error is observed when computer is attacked by viruses and spyware.I think your computer is infected by virus and spyware.You can remove the viruses and spyware by using good Antivirus software,but if you want to get rid of all errors permenantely, solution is format your pc and reinstall your operating system then install good antivirus.
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If Compaq doesn't have one no one else will either.
Have you tried the recover clean up utility? Available as a download (link below)
My guess is that if it will not restore something is wrong with the hard drive. Have you contacted HP to ask them what it means?
Another option is to buy and install windows and download the drivers from Compaq/HP.Same link
You'll find a small panel on the back that you can unscrew to add morememory/ram (or change the current card). Here's an illustrated guide (it's for a Toshiba laptop but the process is identical except for the location of the panel):http://www.fonerbooks.com/laptop_2.htm
The biggest mistake people do is not sysle the battery. A laptop cannot be left on, and plugged in all the time like a desktop. Turn it off if not in use and when using run the battery all the way down every so often. U may have to buy a new battery, so keep these things in mind. Also, ventilation is very important. Though it is called a laptop, soft surfaces inhibatit the cooling systems ability to keep it cool. The more powerful the laptop the hotter it gets. Heat will shorten the life of all the devices of a laptop including the battery.