for security??
I am using 360 Internet security by quihoo for my REAL time antivirus
I also have malwarebytes anti-exploit and malwarebytes antimalware installed
I have spywareblaster installed
for clean up I still use disc cleanup, but I do not check temp files , I like the option to clear all restore points except the last one.
then I use Defraggler and CCleaner from piriform
You should get an alternate browser, do not use IE, I use firefox
Also have WOT web of trust installed on my browsers so I can see at a glance if a website has a good reputation or not.
I use Adfender to stop popup ads
and Foxit reader for reading pdf's, has a smaller footprint than Adobe Reader.
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I had EMET installed at one time but did not like it. I could not tell what it was doing and it slowed my system down.
http://windows.microsoft.com/en-us/windows/xp-downloads#2TC=featured
http://technet.microsoft.com/en-us/windows/windows-xp-downloads.aspx
you can check out the above links.
most are useful, I have no need for search 4.0 and/or Windows live essentials, but you can try some of these .
If you are searching for a certain type of program let me know and I can help your search.
MS Office might require you to buy a licence. Instead, check Libre Office; it's free, and I've used it for years, and haven't been able to find anything it can't handle.
If you're looking for a small, strong, efficient, word processor, try Jarte; also free. Again, I've used it for years, and will use it long before I turn to Office.