Please read the whole thing before doing anything. OK? 
1. A zombie file? try here: http://www.exterminate-it.com/malpedia/remove-zombie
Azombie file can have more than one meaning though, Elana.
1- A zombie (also known as a bot) is a computer that a remote attacker has accessed and set up to forward transmissions (including spam and viruses) to other computers on the Internet. The purpose is usually either financial gain or malice. Attackers typically exploit multiple computers to create a botnet, also known as a zombie army.
Typically, a zombie is a home-based PC whose owner is unaware that the computer is being exploited by an external party. The increasing prevalence of high speed connections makes home computers appealing targets for attack. Inadequate security measures make access relatively easy for an attacker. For example, if an Internet port has been left open, a small Trojan horse program can be left there for future activation.
There are a few other kinds of zombies:
In one form of denial of service attack, a zombie is an insecure Web server on which malicious people have placed code that, when triggered at the same time as other zombie servers, will launch an overwhelming number of requests toward an attacked Web site, which will soon be unable to service legitimate requests from its users. A pulsing zombie is one that launches requests intermittently rather than all at once.
2- On the Web, a zombie is an abandoned and sadly out-of-date Web site that for some reason has been moved to another Web address. Such zombies contribute to linkrot.
3- A zombie file is one left over after uninstalling software. Usually just deleting them is pretty safe.
2. Why are you using 2 antivirals/trojan/malware/rootkit? They can conflict and cause problems.
General answer:
http://answers.microsoft.com/en-us/protect/forum/protect_start/mse-other-anti-malware-spyware-programs/81b25b88-6097-46b7-984a-73e09be3d99a
to remove Super Antispyware: http://www.superantispyware.com/supportfaqdisplay.html?faq=47
A list to remove various different antiviral/etc. programs:
http://answers.microsoft.com/en-us/protect/forum/protect_start/list-of-anti-malware-program-cleanupuninstall/407bf6da-c05d-4546-8788-0aa4c25a1f91
3. I suspect the new installation is the one causing problems. Maybe it deleted an important file? After removing the super antispyware I would run from the elevated command prompt sfc /scannow also consider doing sfc /revert which should restore your system files to their original condition. You have to run them as "Administrator" (right click when you go to "Run").
A good explanation here: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/system_file_checker.mspx?mfr=true
4. Yrag is the resident expert in all things computer... doing the scans shouldn't harm anything, but I'd definitely remove the super antispyware first. You can certainly pm him and ask for help. He's just so knowledgable. I also think (hope) he'll be nice to you.
5. Consider doing a System Restore to a time before having installed the super antispyware.