If you have started to notice that when you open your web browser, either Opera, Mozilla, Internet Explorer or Google Chrome, and the screen just has text in the address box that is labeled About:Blank and it did not used to be set for that location there is a possibility that your system is infected with a malicious program.
Although it is possible for your browser to display About:Blank when there is no html information available, if you have not changed your default page to About:Blank then it is most likely an infection.
Do not worry though as if you continue to read you will find out exactly what About:Blank is as well as how to get rid of this possibly malicious program.
About: Blank, when the cause of a malicious program, is caused by the program usually referred to as Cool Web Search.
This company is also called Cool Web Search and the program usually either directs the users to About:Blank on the first initial times and then all other search engines results are usually passed to a sponsored page where the user actually unknowingly generates revenue for Cool Web Search by clicking on the links presented on their screen.
Now that you know what About: Blank is we can look at two different ways of removing this annoyance from your system. The first way is the harder way, and the second is a lot easier.
The reason the first way is harder is because it is not generally used by people who are not familiar with computer registries as you will manually have to adjust a registry entry. Please note that doing this may or may not remove the infection depending on the variant.
If you are familiar with editing your registry you will have to locate the entry
Once you locate this entry you will have to locate the key named AppInit_DLLs and write down all the information of this entry as it is going to be hard to identify because it is a hidden file. Then you will need to use the Windows Recovery Console, if using Windows XP, to rename the file.
After you rename the file restart the machine and About: Blank should be removed.
Now if you felt that the previous method was too hard to remove About: Blank I do not blame you. I will now tell you how to easily remove the program. The easiest way is downloading and installing an anti-virus and anti-spyware program and complete a full scan of your system to try to locate the files listed above.
Typically the program will easily find the entries and remove the infection from your system. Once this is done many computer experts will advise the formally infected machine to be scanned with a registry cleaner as many times infections will leave little pieces of information within your registry that can affect performance and cause errors at a later time.