I've been having this issue recently with wimfsf.sys and also IRQL_not_less_or_equal. I'm running windows 7 ultimate AMD Athlon II 5200+ 2gigs ddr ram 1gb radeon 4850 gigabyte AM3+ mother board I'm thinking it could be a ram issue but can anyone help me out and see if they can tell me whats wrong via minidump files? Thanks I appreciate it. oh and also, I've been trying to use my windows 7 recovery disc and I can not get it to start up from the drive. When it does start up, it says failed bc of kernel missing.