Thanks for the quick response. OK, will do. Just thought I should probably give a bit of background information and such in case it helps. I've got a new computer, installed STEP to the best of my knowledge with mod organiser (I don't think I really understood it so I didn't install it correctly) and it was working for a bit but kept on crashing to desktop at random points. I was trying to fix this when this error started coming up in mod organiser. I've since reinstalled skyrim and mod organiser multiple times but it still seems to happen. Here's my PC's specs: Processor (CPU) Intel® Core™i5 Quad Core Processor i5-4670 (3.4GHz) 6MB Cache Motherboard ASUS® H81M-E: Micro-ATX, LG1150, USB 3.0, SATA 6GBs Memory (RAM) 8GB KINGSTON DUAL-DDR3 1600MHz (1 x 8GB) Graphics Card 2GB AMD RADEON™ R9 270X - DVI, HDMI, DP - DX® 11, Eyefinity 4 Capable Hard Disk 1TB 3.5" SATA-III 6GB/s HDD 7200RPM 32MB CACHE I'm also using windows 8.