to fix run systemrecreation (or what it's called in english) if that doesn't work... try this
after some time with this stupid virus i have some information to add, it will copy itself to various locations in different names
c:\windows\system32
c\documents and settings\username
c:\program files\browser folder\
c:\documents and settings\username\local settings\temporary internet files\content.ie5\insert lot's of letters and numbers here
alfa.exe
3.exe
xinstall.exe or something
drsmartload1135.exe
sprY
edit: c:\windows\_default.pif
and of course the file you downloaded

uninstalling mesenger too...