ho windows xp professional service pack 2.

saltuarimente (almeno 1-2 volte l'ora!) il mio antivirus (avast home edition 4.7 free)segnala la presenza di file infetto:

ecco un esempio tratto dal report del mio antivirus (notare la successione ripetuta!):

16/05/2006 21.42.06
utente1 1408 S
ign of "Win32:Patcher [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.46.26
utente1 1408
Sign of "Win32:Trojan-gen. {Other}" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.53.42
utente1 1408
Sign of "Win32: DialupPass [Tool]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe\[UPX]" file.

16/05/2006 21.54.16
utente1 1408
Sign of "Win32:Inservice [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.54.20
utente1 1408
Sign of "Win32:Inservice [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.54.23
utente1 1408
Sign of "Win32:Istbar-L [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.54.26
utente1 1408
Sign of "Win32:Istbar-L [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.18
utente1 1408 S
ign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.21
utente1 1408
Sign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.24
utente1 1408
Sign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.28
utente1 1408
Sign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.31
utente1 1408
Sign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.34
utente1 1408
Sign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.37
utente1 1408
Sign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

16/05/2006 21.55.40
utente1 1408 S
ign of "Win32:Bridge [Trj]" has been found in "C:\DOCUME~1\utente1\IMPOST~1\Temp\4004_zip_dump.e xe" file.

cancello ogni volta il file, ma poi l'avviso ricompare...

ho installato da qualche giorno "Google Desktop 4 " e ho notato che solo dopo averlo installato mi è inziata ad apparire tale avviso da parte del mio antivirus

cosa è? è collegato a google desktop? come mi consigliate di procedere?