Hi GerdyBrodel,
- Were there any changes made to the computer prior the issue?
- What is the exact error message that you get when you visit websites?
Refer the methods mentioned below:
Method 1:
Step 1:
Open the Windows Update troubleshooter
http://windows.microsoft.com/en-US/windows7/Open-the-Windows-Update-troubleshooter
Try the fixit as well as the manual methods mentioned in the following link and check:
Step 2:
How do I reset Windows Update components?http://support.microsoft.com/kb/971058/en-us
Important: This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
Back up the registry
http://windows.microsoft.com/en-us/windows-vista/Back-up-the-registry
Method 2:
Why are some webpages blank or incorrectly displayed in Internet Explorer?
http://windows.microsoft.com/en-US/windows7/webpages-look-incorrect-in-Internet-Explorer
Hope this information helps.