On your computer? If so, I got those kind of messages too. You may want to invest on a Antivirus and Firewall program. Those can be anything from annoying to dangerous spyware. My advice to you is to immediately disconnect from the internet, do not click any buttons on the message, get task...
If you worried about finances, take the job that will earn you more money and let you save more money by the time you get to your retirement age.
However, I like a job with as little stress as possible. Why do you need to stress so much about a job if you can't enjoy your days off or vacation...