As the topic title says.

BASICALLY I torrented WindowsBlinds 6 from
here and unzipped it and ran it and stuff. AVG picked up some viruses when I unzipped it, but it said it successfully removed all of them, so I went on fiddling for the next few hours with WindowsBlinds like a man, and got it all working and happy and stuff. Then, when it came time to restart the machine, my desktop doesn't load, and then I open the Task Manager, look in the processes and note explorer.exe isn't running. So I try and run it manually, and it tells me it doesn't exist.

I can run anything else fine by opening task manager, hitting file | run, then navigating to the program and opening it (hence how I'm posting here!).
Basically has anyone got any solutions? I've tried this one:
1. CTRL-Alt-Del to bring up Task Manager.
2. Click File | New Task(run).
3. Type regedit in the Run box and click OK.
4. Browse to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution.options
5. Under this key there will be subkeys named explorer.exe and iexplorer.exe.
These keys are pointing to files that have been removed (virus/spyware); explorer32dbg.exe and iexplore_dbg.exe. Delete the explorer and iexplorer keys entirely. The should not be listed under the Image File Execution.Options key.
6. Close the Registry Editor.
7. Restart the computer.From this thread, but it doesn't work for me. Firstly, I don't have an Image File Execution.options; my folder structure says CurrentVersoin/Image File Execution Options, WHICH I AM GUESSING does not make a buttload of difference either way, but still, there's no explorer.exe or iexplorer.exe (or iexplore.exe) under the image file whatsits. To top it off, using command prompt, I can't find explorer.exe in C:\Windows or C:\Windows\system32, wherever it's supposed to be (only explorer.scf and explorer.vbk)
This solution sounds like it could be worth taking a punt at, but I don't have a replacement explorer.exe so readily available (unless someone can provide me with a clean one online?). This machine has a legal XP Home on it (purchased it from work when they were flogging off their old computers), so that shouldn't be an issue. I'm sure there's a spare disk lying around somewhere, but as to where is another matter.
ANY HELP is greatly appreciated on this, dudes. Thanks a bunch.