Hi, 1st post and am asking questions. Forgive me if this is a stupid question, but I'm not very up on os stuff. On startup , my friends computer gets the following message: C:document\ALLUSE~1\STARTM~1\Programs\startup\netlog~1.EXE The NTVDM CPU has encountered an illegal instruction. cs053c ip:b587 op : ff ff ff ff Choose close to terminate window. And a seperate window which says: Error reading reg 678.dll Module not found As far as I know, he hasn't installed anything recently. Is it something picked up from the net, virus,etc? What would it be affecting. Is there anything that can be done to fix this? All help gratefully received. Thanks in advance, ftc.