D: guys please help me!!!

I downloaded that l)xt hack thing and it fked up my computer with a virus now i kno i was an idiot for downloading it and all but please can some1 help me fix this this ia a really big problem for me and i need to fix it D: please help if u can

Send in, system restore, new comp, Darren's Boot n' Nuke MS-DOS app if it's a desktop, pray

how do i do all that? i cant find system restore i looked all over for it DDD: