XP Not Running Anything

I will try to go into detail with what is wrong with my computer running Windows XP Service Pack 2.

On Thursday I noticed that I had a virus that was masquerading as a program called "Zinaps." Apparently a lot of computers had been infected by it. I didn't know how to uninstall it, so I searched google and was told to do many different things. I ended up going into my "Documents and Settings" folder and deleting any folder that was called "Zinaps." I also went to Run and typed in the command "regedit" for the registry editor and I deleted some things that were related to Zinaps (or so I was told).

Anyway after deleting all that stuff and rebooting XP I was surprised to find that I no longer had the XP Royale theme and instead had the Windows Classic theme. I didn't know what happened so I right clicked on my desktop and tried to apply the Royale theme and was told that "The Theme service is not running, please start the Service." I went to control panel and clicked on "Services" and the "Theme" service wasn't even there.

I also found out that my computer would not open up my "Network Connections" folder saying that "The Network Connections folder service is not working, please go to Services and start the service." Turns out a lot of things are not working. My computer will not connect to the internet as well, and will not allow me to open any USB devices, although it does detect them. (The USB drive is not even viewable in "My Computer")

I tried going to "msconfig" and making every service "Automatic" and "Started" and that still didn't solve anything.

Does anyone know what is going on and how I can get my XP back to working condition? This is very frustrating. Thanks in advance.