blue screen of death

hi,

i’m a hardware administrator here at my company but lately i’m having a problem with some windows 98 se pc which everytime they enter into there outlook and they want to create a new message it gives them the blue screen but the problem is not with outlook with some other software too i don’t if it’s a virus i have run a virus scan on the pc’s but nothing the error reads as follows (A Fatal Exception OE has occurred at 0028 : C00140DB in VXD VMM (01) + 000130DB.) and i also had this one too (A Fatal Exception OE has occurred at 0028 : C028076F in VXD VMM (06) + 0000376F.) so i don’t know what to do and i do hope that u can help me

thanks