I have fixed a few computers for people lately and I got a ladies computer I work with and began working on it. It ran windows xp and was very slow. I was having issues getting malwarebytes to run but did a partial scan and removed 16 infected files. It is an emachine. I opened the case to see what it was was running and it had a 512 and 256 slot of ram in it. It was pretty dirty so I sprayed some air in it to clean it up a bit. When I started it back up it wouldn't start so I opened the case up and started it I thought I saw some smoke and smelled a burnt plastic smell I think from the processor area. Any insight on what happened if some condensation from the air got into the processor or what may have caused this. I am trying to think how to break the news and hopefully not end up buying this lady a new computer. She had something called bigfix running, I think an expired mcaffee and norton security center running. It is model T3406, hopefully they are cheap lol. Thanks.