System:

M.Soft Windows XP

Home Edition

Version 2002

Service Pack 2

Dell Dimension DIM 2400

Celron (R) CPU 2.60 hz

2.59 GHz.256 MB of Ram

Avast

Comodo

Ad+Ware (do  not understand how to use it, shows 500 infections, all cookies???, not doing to a thing to it)

Malawarebytes'( which I used to elimiate a "virus" (Internet Explorer Virus...???)

............

Yes, I do maintenance on my computer, daily. 

I am having an update problem, as you can see. 

Automatic updates"

"Some updates cannot be installed" 

Here is the list:

Windows XP Service Pack 3 (KB936929)
Security Update for Windows Media Player 10 for Windows XP (KB936782)
Security Update for Windows XP (KB944338)
Security Update for Windows XP (KB950749)
Security Update for Windows XP (KB951748)
Cumulative Security Update for Internet Explorer 6 for Windows XP (KB953838)
Security Update for Outlook Express for Windows XP (KB951066)
Update for Windows XP (KB952287)
Security Update for Windows XP with Windows Media Format Runtime 9.5 (KB923689)
Update for Windows XP (KB951072)
Security Update for Windows XP (KB950762)
Security Update for Windows XP with Windows Media Format Runtime 9.5 and 11 (KB941569)
Windows Malicious Software Removal Tool - August 2008 (KB890830)
Security Update for Windows XP (KB951698)
Security Update for Windows XP (KB950974)
Windows Internet Explorer 7 for Windows XP
Cumulative Security Update for ActiveX Killbits for Windows XP (KB953839)
Security Update for Windows XP (KB946648)
Security Update for Windows XP (KB952954)
Security Update for Windows XP (KB951376)