Save your critical data and reformat. Go out an buy a copy of XP. ME is the worst OS in history!!!!!!!!! And I repeat: ME is the worst OS in history!!! You either need to go back to 98SE or forward to XP! It sounds like the typical ME logon issue. Once the driver data base becomes a little "tweaky" in ME you are screwed. You can't repair it or tune it!!
Noli Nothis Permittere Te Terere!!
EVGA 680i, Dual EVGA 8800GT'S (650/950), 4 gigs OCZ DDR2 1066, Intel Q9450 at 3.8 Ghz, Koolance Water Cooled, Dual Plextor16x DL DVD+/-RW. Dual WD 250gb 16mb Cache Sata 3.0. 3DMark06 score = 19,168.