Virus "eating" hard drive space.

Oh yes, I forgot to mention that I own the PANDA Antivirus Pro 2010 and I’ve already run scans with Malwarebytes’ Anti-Malware, but nothing would restore my fifteen Go that I lost...

(Up!) Since my last message I’ve lost another 2GB ...

Arf I just did a system restore and I have no sound anymore! This is getting serious, please help me...

Malwarebytes' Anti-Malware 1.44
Database version: 3679
Windows 6.0.6002 Service Pack 2
Internet Explorer 8.0.6001.18882

03/02/2010 19:40:10
mbam-log-2010-02-03 (19-40-10).txt

Scan type: Quick scan
Objects scanned: 100438
Elapsed time: 10 minute(s), 53 second(s)

Infected memory processes: 0
Infected memory modules: 0
Infected Registry keys: 0
Infected Registry values: 0
Infected data items: 0
Infected directories: 0
Infected files: 0

Infected memory processes:
(No malicious items detected)

Infected memory modules:
(No malicious items detected)

Infected Registry keys:
(No malicious items detected)

Infected Registry values:
(No malicious items detected)

Infected data items:
(No malicious items detected)

Infected directories:
(No malicious items detected)

Infected files:
(No malicious items detected)

I don’t see anything in this report... Maybe we should use another software?

UP

Are you sure it isn’t coming from your restore points? You should consider deleting them because they take up a crazy amount of space! I did it and I recovered 22 GB all at once!

Actually, it makes me lose a huge amount of gigabytes to delete restore points, but I don’t understand why I’m losing nearly 5 per day without installing anything.

I found a virus on the C drive in the form of a file of type eui44152a5zejapzke filled with Z with an evocative name: ZZZZz.ZZZZZ...Z unreadable (.zzzzzzzzz) (hundreds of files ZZZ...ZZZZZ.Z.ZZ and other variants.)
when I delete it there still remains an unremovable one because it is active, with visible activity of multiplying. each weighed 500 to 600 MB (filled I presume with Z in quantity ... approx 600 Z per file).
I put the active file in quarantine and was surprised by its filthy progeny Zédiforme in the margins of the hard memory, and while writing this I realize that I will rewrite over it just in case my PC decides to go back to sleep in cartoon-band style