Well there is also the W32.Welchia.Worm (aka Win32.Nachi).. this family infect in a similar manor.. but wait there's more... besides the regular RPC-DCOM vul.. it uses a couple of extra.. now as for infecting WINME.. then you have a different family of virii.. ..
How do you know it is a Blaster Varient? Just because the computer restarts isn't cause enought to name it the same. What have you done to investigate this.. what are the active files on the machines? Find some code and post it for some others to analyse it..

.. My Tv isn't working.. last time it did this it was a blowen fuse.. Ok I will put in another fuse and see what happens..
Blast.. it still isn't working.. must be a different type of blown fuse.. I'll keep blaming the fuse..
(I hope this gets my point across)

Cheers