It is the dll i.e. dynamic link library files in your system that are responsible for linking common files and the system together. A rundll.exe loading error message often occur in the even that there are changes in the location of .dll files in the system. Most often this message occurs during start up. When installing and uninstalling programs, shared .It is possible that dll files may be renamed or moved by accident. The system can experience a slow down as the registry attempts to find the file. If the file has been deleted or cannot be found a rundll error loading message pops up on the screen.

Don’t skip simple steps such as rebooting your pc, it has been known to solve problems such as this. Malware i.e. ad ware or spy ware in addition to viruses could be responsible. You should run anti-virus and perform a spy-ware scan on your computer to make sure this is not the cause. Try reinstalling a program that you may have recently removed. This may have been the cause of the error. Later try to use the add/remove programs option to uninstall the program the proper way.

You can yourself find the corrupt file using the MSCONFIG command in the run dialogue box. When a .dll file is installed updates are made in the registry. There are several hundred dll’s on your system, and it can be very time consuming to attempt to find the corrupted file. The records in the registry can be viewed by tying the command ‘regedit’ in the ‘Run’ dialogue box. This information is then stored as 6 HKEY folders. It is not recommended that you try to repair the error yourself, or further system damage could occur. You can do damage to your system by accidentally removing an important registry key. Eventually you might find that you are not even able to boot the system.

IT professionals use registry cleaners to correct these errors. If necessary, you can hire a pro for a fee to repair the problem for you. Another alternative is to use the software the professionals use. Well known registry cleaning software include Register Easy and RegClean. This helps you to find and isolate the files that are missing or currupted and reinstall them. Scanning your registry once every six months will help to keep it organized. See how the top registry cleaners stack up

Traditionally, Apple Mac computers have been – for the most part – immune to viruses and spyware. Perhaps this was the case because Macs comprised a smaller share of the market than their Windows counterparts. But as the popularity of OSX continues to grow, the risk of an attack by a malware virus will also increase.

In anticipation of such a threat, Steve Jobs and his team have incorporated a defense into the new Snow Leopard operating system. Under older versions every time a user tried to open any file that was an internet download, a warning would pop up and ask if they really wanted to open that file. The user was given the choice to confirm or cancel.

Under Mac OSX 10.6 the downloaded file is now compared to a list of malicious software. If the file is infected the user gets a warning telling them as much and is given the option to abort the operation. Currently, the list of trojans is very short but will be kept up to date by Apple.

This built in malware protection feature is another good reason to make the Snow Leopard upgrade.