I LOVE MELINNEUM!!! thats the worst os ever...thats how i make my money!! i help out at a pc shop, and ive been on me since it came out,(till i got xp, last month) and can fix almost nething with it...ok what happened is a virus attacked explorer.exe, and infected it...now antivirus cant touch explorer.exe because its read only, and yea, so to fix it, you got to get a good exploere.exe from another me system, and replace the one on the one ur havin probs in, but heres the tricky part. because its read only, u have to pull the hdd and do it in another pc. replace explorer.exe, and all should be well, cheers!