2 trojans found

A while back my friend found some malware on her laptop (running XP) with a CA Yahoo! Antispy scan, and deleted it. Soon after, her machine slowed to a near standstill, and she found through trial and error that the "remedy" for that was to uninstall her AVG protection, which actually did get her back up to speed. I put the new AVG 8.0 Free on her machine, but it was so resource-hungry and slow that she uninstalled it.

She's gone a few weeks without any protection at all, so I decided I'd install what I always use for real-time protection - avast! 4.8 Home, and ThreatFire.

After installing avast!, I did a full system scan and found the trojan "Win32: Faker-J [Spy]", which was somewhere in her System Restore file (sorry, I don't know exactly where).

I then downloaded and ran a Malwarebytes full scan, a Spybot S and D full scan, and a SuperAntispyware full scan. I wasn't really following your READ AND RUN ME protocol exactly, I was just using some effective scans. In any case, none of those scans turned up anything, so I went ahead with the ThreatFire installation.

The ThreatFire scan turned up another trojan - Trojan.EZESP in C:\Windows\System32\ezSP_Px.exe.

So what I'm wondering is, even though I did the scans in a different order, and did a Malwarebytes full scan instead of a quick one, and did a ThreatFire scan afterward, can I now do the ComboFix and MGTools scans and post the four logs, or do I need to start over and run the protocol exactly?

(Incidentally, since I installed the avast!, her machine's been significantly slower in running each scan and in browsing with IE.)