Hello Rick. Thanks for your quick reply.
I run O&O's Defrag program on my system and left it alone (big
mistake !). When I returned, I found that the program was
interrupted (I don't kanow why). It is possible that one or
more sectors where damaged (?).
This morning I recivied the "The system has recoverd from a
serious error" massage.
The error signature was:
BCCode:9f BCP1:00000500 BCP2:00000002 BCP3:81AA3E70
BCP4:81AF3E30 OSVer:5_1_2600 SP:2_0 Product:256_1
The files mentioned below were included in the error report:
C

OCUME~1...LOCALS~1TempWERba87.dir00Mini092004-03.dmp
C

OCUME~1...LOCALS~1TempWERba87.dir00sysdata.xml
I did a little reserch and came with the following links:
http://support.microsoft.com/default.aspx?scid=kb;en-us;315249
http://www.deadparrots.net/archives/technology/0312mystery_solved.html
(this is for win 2000, but I think it is relevant).
I run the Sigverif tool and found tens of files (drivers and
so), but in light of what I mentioned above, it seems unlikely
that it is a device driver.
Any ideas ?