MS Outlook errors such as slowness, crashing, freezing are very common and are mostly originated in the Windows registry. The registry is a large database that contains information about every program installed on the computer. If a particular file is missing or is corrupted in some way, users may experience issues with specific programs such as Outlook.

Additionally, if the computer was attacked by malware, traces of the malware are almost always found on the registry. These traces cannot be removed by ordinary virus scans since these programs do not always scan the registry.

An easy solution to registry problems is using a registry cleaner. Registry cleaners are a type of software designed to scan the registry for various types of errors. Once the errors are located, the program is designed to correct or eliminate the problematic files. But not all registry cleaners are alike; you will need to research your options carefully since some programs are better than others.

Here are some things to consider as you research your options:

1. Freeware programs are excellent diagnostic tools but are not recommended for the actual cleaning process. These programs are typically full of bugs and are outdated and may therefore damage your computer.

2. A good registry cleaner should be easy to use and require minimal user intervention. This is especially important if you are new to registry cleaning and want to minimize the amount of action on your part.

3. Consider purchasing a cleaner from a well established and well known company. You will have easier time finding information about the software online and will have a better chance of getting a good product.

4. Choose a program that lets you "test-drive" it before you buy. This will help you make a better decision.

5. Make sure the program removes all types of errors from the registry; some programs will only remove some types and not others.

6. Make sure your program of choice has a backup function. This will serve as a security measure, in case an important file is deleted from the registry during cleaning.

In sum, if you are experiencing issues with Outlook Express, it is worth your while to explore the option of registry cleaning for your computer.