When visiting Microsoft Update on a Windows XP system, you get the following message and error:

The website has encountered a problem and cannot display the page you are trying to view. The options provided below might help you solve the problem. [Error number: 0x80248015]

The error is usually a result of the time & date being set incorrectly. However, since November 18, 2014, the error may also be a result of a defective file, MUWEB.DLL, version 7.6.7600.257. Downloading an older version of the file, version 7.6.7600.256, and copying over the newer version may correct the problem.

Use the links below to download version 7.6.7600.256 of MUWEB.DLL from Microsoft’s website.
MUWEB.CAB (Windows XP 32-Bit)
MUWEB.CAB (Windows XP Pro SP2 64-Bit)

Extract MUWEB.DLL from the cab file and copy it to the Windows\System32 directory. Confirm file replacement and retry the Microsoft Update website.

Note: This only applies to Microsoft Update. Windows Update appears to be unaffected. The two sites look identical, but Microsoft Update offers additional software. If you have Microsoft Update installed, there is no way to switch back to Windows Update while Microsoft Update fails to work. If Microsoft Update is installed and you try to visit the Windows Update site, you will automatically be redirected to Microsoft Update.