Remove Clbdll.dll Trojan Immediately

Clbdll.dll is a backdoor Trojan and should be removed immediately from your computer. Trojans are a form of malware which are often installed on machines by users who have been duped into thinking that there is a benefit to installing them.

You know you have this infection if you get this pop up error message:

The Application or DLL C:\windows\system32\clbdll.dll is not a valid windows image. Please check this against your installation diskette.

Every time a user opens a browser, the pop ups start all over again.

File Behavior

Clbdll.dll has been known to use anti-disassembly tricks to avoid detection and analysis by security products. The process is also known to be packed and or encrypted with a software packing process.

Clbdll.dll has also been known to register itself as a dynamic link library file. Note the similarity in the name of clbdll.dll to clb.dll. At first glance, a user may overlook clbdll.dll as the name is very similar to clb.dll, which is a valid file.

Clbdll.dll is also known to be created and deleted as a process on the disk.


Clbdll.dll has been observed in the United Kingdom, Spain and the United States.


The following are the known aliases of clbdll.dll:


These threats are known to associate with clbdll.dll:

Trojan Horse
Generic AdClicker.d

How to Remove Clbdll.dll

Method 1

  1. Search your computer, including hidden files, for all instances of clbdll.
  2. Delete the entries that you find.
  3. Make sure you do not delete clb.dll which is a valid dynamic link library file.

Method 2

  1. Update your antivirus and anti-spyware programs. If you do not have either installed, we recommend that you try STOPzilla Antivirus and Spyware Cease as your antivirus and anti-spyware program respectively.
  2. Run a full scan.
  3. Delete the entries that are found.

You can also try running scans using different programs like HijackThis to identify other suspicious files. However, be forewarned that HijackThis is not for beginners. The best way for a beginner or average user would be to have help from experts in identifying entries that should be removed.

Another specialized cleaning tool is ComboFix. Again, this tool is very powerful and should not be taken lightly. Run this only with guided, expert help.

Ad-Aware and Malware Bytes are other programs that you might want to run to get rid of spyware residing in your system.

Not all antivirus programs are created equal. Their virus definition databases and responses to various threats differ. This is why users are sometimes advised to run one antivirus scan after another.

However, do not run two antivirus scans simultaneously, and do not keep two active antivirus programs in your system as this will only cause issues and will not adequately protect you.

Instead, choose a dependable antivirus program. This way, you will have no need for another virus removal utility. You should also pair your antivirus with an anti-spyware program to increase your level of protection.