I made a correction on my previous posting, so please read again.
I frequently keep getting error code 20000008 when I update Definition
Update for Windows Defender KB915597 (not Windows Malicious Software Removal
Tool), until it finally installs.
Also, when I update my Windows Malicious Software Removal Tool KB890830 it
keeps asking to update even after it was successfully installed.
I am using Windows Vista Ultimate.
I'll greatly appreciate any advise given. Thanks in advance.