How to Fix System32.dll

1. Run a registry cleaning program to clean and repair DLL file problems on your computer. The Windows registry cleaning utility is an example of a registry cleaning program.
2. Ensure that a Trojan virus has not installed itself in your System32 folder. Trojans disguise themselves as useful or important programs by under clever names. Many people download them under the illusion that they are something else, hence the Trojan Horse reference. Once inside your computer, it gives the Trojan operator access to private files, the ability to download other harmful malware and viruses, and a fair amount of control over your computer.
3. Get rid of a Trojan or other malware by running anti-malware security software. If you already have a security program that protects against malware, use in to scan your PC. If you do not have an anti-malware program, download or buy one. There are many free versions available on the Internet, but be careful because some of them are Trojans in disguise. CNet suggests Malwarebytes anti-malware program and describes it as effective, free and equipped with nice features. Windows also offers two types of anti-malware software for free. One available for download is the Malicious Software Removal Tool and the other is a free online scan of your PC called Windows Live Safety Scanner.
4. If other attempts to repair the errors have failed, you can restore your system to how it was before you had the System32 error. System Restore is available with Windows operating systems. Open it by clicking 'Start,' 'All Programs,' 'Accessories,' 'System Tools' and 'System Restore.' System Restore automatically saves registry points on your computer, allowing you to restore your computer to a point in time before the error. System Restore does not save any personal files and cannot help if a personal file has been damaged or deleted.