Laptop shuts down after about 30 seconds of being on
I have a Dell Inspiron N4030 and I have had it for a little over a year and recently when I turn it on it will boot up and by the time I can log into the administrator account it shuts down. Sometimes when I start it up a disk check will start up but I tried it once and it did nothing. Also I noticed one of the fans on the back isn't running like normal so I was thinking it is over heating but could it be a virus.
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It wouldn't be a virus causing it if your PC just cuts off.
It may be your CPU overheating and stopping your PC altogether in-order to protect the CPU from damage.